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John Ruiz
John Ruiz
John Ruiz
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John Ruiz (born January 4, 1972) is an American former professional boxer who competed from 1992 to 2010, and held the WBA heavyweight title twice between 2001 and 2005. Ruiz is of Puerto Rican descent, and is the first Latino boxer to win a world heavyweight title.[2]

Key Information

Amateur career

[edit]
  • 1991: Competed as a light heavyweight at the World Championships in Sydney, Australia. Results were:
  • 1992: Competed at the Olympic Trials in Worcester. Result was:

Professional career

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First reign as WBA heavyweight champion

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After Lennox Lewis defeated Evander Holyfield for the undisputed (WBA, WBC, and IBF) heavyweight title in late 1999, the WBA ordered Lewis to defend the title against mandatory challenger Ruiz, but Lewis refused. Though he had been undefeated since his 1st round 19 second loss against David Tua in 1996, the level of competition Ruiz had been facing was suspect and the only name he had beaten (to date) was a nearly 40-year-old Tony Tucker.

Ruiz and his management sued, claiming that WBA rules entitled him to a title shot. A judge agreed, but rather than face Ruiz in a bout that was seen as commercially unattractive, Lewis instead fought Michael Grant, considered to be a very worthy contender at the time, having knocked out a series of recognized "name" opponents on HBO. After learning of this, the judge decreed that upon entering the ring against Grant on April 29, 2000, Lewis would automatically forfeit the WBA title.

Ruiz vs. Holyfield

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Main articles: Evander Holyfield vs. John Ruiz, Evander Holyfield vs. John Ruiz II, and John Ruiz vs. Evander Holyfield III

Ruiz fought former champion Holyfield to fill the vacancy on August 12, 2000, losing by unanimous decision (this result made Holyfield the first to win a world heavyweight title on four occasions). Many observers and boxing reporters felt that the underdog Ruiz had done enough to win.

Due to this controversial decision, the WBA ordered an immediate rematch in early 2001, and Ruiz won the WBA title. Some critics still believe the decision was controversial (Ruiz was on the ground for a few minutes after Holyfield appeared to deliver a low punch to the groin). Footage following the match showed that the punch may have been legal, but it wasn't disputed.

Ruiz defended the title twice: a controversial draw in a third match against Holyfield where the press believed Holyfield to have won, and a disqualification victory against Kirk Johnson where the Canadian contender was disqualified for repeated low blows in the tenth round. Ruiz was accused in both the second Holyfield fight and the Johnson fight of faking low blows that actually seemed to be closer to his beltline than his groin (although Johnson was shown on replays to hit Ruiz below the belt several times).

Ruiz vs Jones Jr.

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Main article: John Ruiz vs. Roy Jones Jr.

On March 1, 2003, Ruiz was contracted to fight Roy Jones Jr., who at the time was The Ring light heavyweight champion. If Jones was to beat Ruiz in the fight, he would join Bob Fitzsimmons, Michael Spinks, and Michael Moorer as the only three fighters to win titles at light heavyweight and heavyweight as well as becoming the second fighter (Fitzsimmons being the first) to win titles at both middleweight and heavyweight. Ruiz, who said referee Jay Nady "wouldn't let me fight my fight", lost a unanimous decision to Jones and moved back into the WBA's contender pool.

Second reign as WBA heavyweight champion

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Main articles: Hasim Rahman vs. John Ruiz, John Ruiz vs. Fres Oquendo, John Ruiz vs. Andrew Golota, and John Ruiz vs. James Toney

Ruiz, however, would receive another shot before 2003 was out. As champion Jones was required to face the WBA's number one contender, former WBO champion Vitali Klitschko. Neither the Jones nor the Klitschko camps were able to agree to a fight by an imposed deadline, so Jones became a champion-in-recess. Klitschko, however, did not want to fight the #2 contender, former WBC, IBF, and lineal champion Hasim Rahman, for the interim championship. After David Tua, the #3 contender, also turned down the fight against Rahman, Ruiz, the #5 contender and the only one interested in the fight, decided to accept. He fought Rahman on December 13, 2003, and with a unanimous decision victory became the WBA's interim champion. When Jones announced on February 24, 2004, that he would return to competing in the light heavyweight division, the WBA took the interim tag off Ruiz, and he became an official two-time WBA heavyweight champion.

On April 17, 2004, Ruiz fought the first defense of his second world title. He retained it with an eleventh-round technical knockout of Fres Oquendo at Madison Square Garden. This fight was historic in that it was the first time two Hispanics/Latinos faced each other for a version of world heavyweight title.

On November 13 of that same year, Ruiz retained the belt with a controversial unanimous decision over Polish-American[3] Andrew Golota – among other things he suffered two knockdowns and a one-point deduction by referee Randy Neumann. Ruiz vs Golota was the Main event of Don King's Night of Heavyweights card, it did 120,000 Pay-Per-View buys[4]

On April 30, 2005, Ruiz lost the title to James "Lights Out" Toney in Madison Square Garden by unanimous decision, marking the second time that Ruiz had lost to a former middleweight champion. Frustrated by years of criticism from the boxing press and fans, he retired upon his second loss of the WBA title on April 30, 2005 (to James "Lights-Out" Toney).

However, after Toney failed the post-match drug test (for stanozolol, an anabolic steroid), the New York Athletic Commission suspended him from boxing in the United States for 90 days, and fined him $10,000 (U.S.). The WBA banned the aging (then 36 years old) Toney from fighting for its heavyweight title for the next two years. This resulted in Toney's win being changed to a "no contest"—basically, a nullification which also reinstated Ruiz as champion. Ruiz came out of retirement after just ten days of his initial announcement, before it was found out that Toney would be suspended and he would be reinstated as champion. Ruiz then filed a lawsuit against Toney, claiming that he had damaged Ruiz's boxing career (due to Toney's use of illegal steroids before their bout).

Controversial loss to Valuev

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Main article: John Ruiz vs. Nikolai Valuev

On December 17, 2005, Ruiz lost the WBA Championship in Berlin to 7 ft. tall, 324-lb. Russian Nikolai Valuev. The official outcome was a majority decision (scored 114–116, 113–116, and 114–114), but it was also a controversial one. Ruiz was convinced that his jab/combination-punch technique had given him a clear victory. He demanded that his promoter, Don King, set up an immediate re-match with the now-first-ever Russian world heavyweight champion. Ruiz's long-time manager, Norman Stone, declared that they would also formally petition the WBA: after all, the 10,000 German spectators booed when the decision was announced. Ruiz's camp claimed that the Germans booed because they too felt that the outcome was unjust. Wilfried Sauerland, the manager who rescued Valuev's career from obscurity two years earlier, angrily countered that the fans had booed because Stone's in-ring behavior had agitated them.[5]

In September 2006 Ruiz announced that he would be managed by Sauerland. His former manager Norman Stone retired on December 22, 2005, stating that the decision in the loss to Valuev was the last straw, and he would continue to support Ruiz from retirement.[6]

Road back to title contention

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After the loss Don King announced his intention to still promote Ruiz. King had become aware of Ruiz after his KO win over the former IBF title holder Tony Tucker in 1998.[7] Ruiz followed up the loss to Valuev with a fight against up-and-coming contender Ruslan Chagaev. In a close fight, Chagaev prevailed, taking a split decision with scores of 117–111 and 116–112 for Chagaev, and 115–114 for Ruiz. Chagaev became the mandatory challenger for a shot at Valuev, whom he defeated on April 14, 2007, to claim the WBA heavyweight championship.

Another comeback

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Ruiz faced Otis Tisdale on October 13, 2007, and ended the fight with a TKO victory in the second round as referee Pete Podgorski called a halt to the bout as Tisdale went down for the third time. The bout was scheduled for 10 rounds. On March 8, 2008, Ruiz won a 12-round unanimous decision over Jameel McCline in Mexico.

Ruiz vs. Valuev II

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Main article: Nikolai Valuev vs. John Ruiz II

Valuev defeated Ruiz by unanimous decision on August 30, 2008. Scores were 114–113, 116–113, and 116–111. The result was initially declared a split decision win for Valuev. The 114–113 score by ringside judge Takeshi Shimakawa was announced in favor of Ruiz. Shimakawa alerted WBA officials after that his score was intended for Valuev. One of the scorecards had the names of the fighters in opposite order, resulting in the confusion.

The decision was once again unpopular with the live crowd as some booed the outcome, much like the first match in December 2005.

Final world title shot

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Main article: David Haye vs. John Ruiz

After petitioning the WBA to protest against the outcome of his controversial fight with Valuev, Ruiz was made the WBA's mandatory challenger to fight the winner of Chagaev-Valuev II in 2009. As that bout was cancelled, Ruiz stepped aside as mandatory challenger so Valuev could fight Cruiserweight Champion David Haye. On the undercard to that fight Ruiz stopped Adnan Serin in 7 rounds. Ruiz, coming in at 226 pounds (his lightest since 2001), dominated his overmatched opponent to retain his mandatory challenge to the WBA belt. Valuev later lost a majority decision to David Haye, meaning Ruiz would now fight Haye for the WBA title, after Haye had recovered from a hand injury. When the fight took place on April 3, 2010 at the M.E.N. Arena in Manchester, Ruiz lost to Haye by TKO when his corner threw in the towel in the ninth round after suffering four knockdowns in the previous rounds. Ruiz, whose face was covered in blood, could not stand up to Haye's greater speed and power.

Retirement

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Following his loss to David Haye, Ruiz announced his retirement after an 18-year boxing career. He finished with a professional record of 44–9–1–1, with 30 knockouts. In 2013, he opened Quietman Sports Gym in Medford, Massachusetts, offering both boxing and MMA (mixed martial arts) training to all ages. While all ages are welcome, he focuses on providing an alternative for at-risk children and teenagers in the Greater Boston area. He has also indicated that he wants to return to boxing in some capacity as either a manager or trainer at some point.[8] In 2014, boxing.com ranked Ruiz as number 83 on its list of "The 100 Greatest Heavyweights of All Time".[9]

Professional boxing record

[edit]
55 fights 44 wins 9 losses
By knockout 30 2
By decision 13 7
By disqualification 1 0
Draws 1
No contests 1
No. Result Record Opponent Type Round, time Date Location Notes
55 Loss 44–9–1 (1) David Haye TKO 9 (12), 2:01 Apr 3, 2010 MEN Arena, Manchester, England For WBA heavyweight title
54 Win 44–8–1 (1) Adnan Serin TKO 7 (10) Nov 7, 2009 Nuremberg Arena, Nuremberg, Germany
53 Loss 43–8–1 (1) Nikolai Valuev UD 12 Aug 30, 2008 Max-Schmeling-Halle, Berlin, Germany For vacant WBA heavyweight title
52 Win 43–7–1 (1) Jameel McCline UD 12 Mar 8, 2008 Plaza de Toros, Cancún, Mexico
51 Win 42–7–1 (1) Otis Tisdale TKO 2 (10), 0:45 Oct 13, 2007 Sears Centre Arena, Hoffman Estates, Illinois, U.S.
50 Loss 41–7–1 (1) Ruslan Chagaev SD 12 Nov 18, 2006 Burg-Wächter Castello, Düsseldorf, Germany
49 Loss 41–6–1 (1) Nikolai Valuev MD 12 Dec 17, 2005 Max-Schmeling-Halle, Berlin, Germany Lost WBA heavyweight title
48 NC 41–5–1 (1) James Toney UD 12 Apr 30, 2005 Madison Square Garden, New York City, New York, U.S. WBA and IBA heavyweight titles at stake;
Originally a UD win for Toney, later ruled an NC after he failed a drug test
47 Win 41–5–1 Andrew Golota UD 12 Nov 13, 2004 Madison Square Garden, New York City, New York, U.S. Retained WBA heavyweight title
46 Win 40–5–1 Fres Oquendo TKO 11 (12), 2:33 Apr 17, 2004 Madison Square Garden, New York City, New York, U.S. Retained WBA heavyweight title
45 Win 39–5–1 Hasim Rahman UD 12 Dec 13, 2003 Boardwalk Hall, Atlantic City, New Jersey, U.S. Won WBA interim heavyweight title
44 Loss 38–5–1 Roy Jones Jr. UD 12 Mar 1, 2003 Thomas & Mack Center Paradise, Nevada, U.S. Lost WBA heavyweight title
43 Win 38–4–1 Kirk Johnson DQ 10 (12), 2:17 Jul 27, 2002 Mandalay Bay Events Center, Paradise, Nevada, U.S. Retained WBA heavyweight title;
Johnson disqualified for repeated low blows
42 Draw 37–4–1 Evander Holyfield SD 12 Dec 15, 2001 Foxwoods Resort Casino, Ledyard, Connecticut, U.S. Retained WBA heavyweight title
41 Win 37–4 Evander Holyfield UD 12 Mar 3, 2001 Mandalay Bay Events Center, Paradise, Nevada, U.S. Won WBA heavyweight title
40 Loss 36–4 Evander Holyfield UD 12 Aug 12, 2000 Paris Las Vegas, Paradise, Nevada, U.S. For vacant WBA heavyweight title
39 Win 36–3 Thomas Williams TKO 2 (12), 0:50 Dec 11, 1999 Grand Casino, Tunica, Mississippi, U.S. Retained NABA heavyweight title
38 Win 35–3 Fernely Feliz TKO 7 (12), 3:00 Jun 12, 1999 Aleppo Shrine Auditorium, Wilmington, Massachusetts, U.S. Won vacant WBA–NABA heavyweight title
37 Win 34–3 Mario Cawley TKO 4 (12), 1:09 Mar 13, 1999 Madison Square Garden, New York City, New York, U.S. Retained WBA–NABA heavyweight title
36 Win 33–3 Jerry Ballard TKO 4 (12), 2:17 Sep 19, 1998 Georgia Dome, Atlanta, Georgia, U.S. Retained NABF heavyweight title;
Won vacant WBA–NABA heavyweight title
35 Win 32–3 Tony Tucker TKO 11 (12), 0:58 Jan 31, 1998 Ice Palace, Tampa, Florida, U.S. Retained NABF heavyweight title
34 Win 31–3 Ray Anis TKO 1 (12), 0:22 Jun 17, 1997 Casino Magic, Bay St. Louis, Mississippi, U.S. Retained NABF heavyweight title
33 Win 30–3 Jimmy Thunder SD 12 Jan 14, 1997 Hale Arena, Kansas City, Missouri, U.S. Won vacant NABF heavyweight title
32 Win 29–3 Yuriy Yelistratov TKO 3 Nov 26, 1996 York Hall, London, England
31 Win 28–3 Nathaniel Fitch TKO 3 (6) Oct 25, 1996 The Roxy, Boston, Massachusetts, U.S.
30 Win 27–3 Greg Pickrom TKO 1 (10) Jul 18, 1996 The Roxy, Boston, Massachusetts, U.S.
29 Win 26–3 Doug Davis TKO 6 (10) Jun 6, 1996 The Roxy, Boston, Massachusetts, U.S.
28 Loss 25–3 David Tua KO 1 (12), 0:19 Mar 15, 1996 Convention Hall, Atlantic City, New Jersey, U.S. Lost WBC International heavyweight title
27 Win 25–2 Steve Pannell TKO 4 (10), 1:28 Oct 7, 1995 Convention Hall, Atlantic City, New Jersey, U.S.
26 Win 24–2 Willie Jackson KO 1 (10) Aug 24, 1995 Somerville, Massachusetts, U.S.
25 Win 23–2 Derrick Roddy KO 2 (12), 2:56 Jun 16, 1995 Elephant and Castle Leisure Centre, London, England Won vacant WBC International heavyweight title
24 Win 22–2 Michael Murray TKO 4 (10) May 17, 1995 Ipswich, England
23 Win 21–2 Jack Basting TKO 1 (8) Mar 30, 1995 York Hall, London, England
22 Win 20–2 Boris Powell UD 10 Feb 4, 1995 Silver Nugget, North Las Vegas, Nevada, U.S.
21 Win 19–2 Rick Sullivan KO 2 Oct 1, 1994 The Roxy, Boston, Massachusetts, U.S.
20 Loss 18–2 Danell Nicholson SD 12 Aug 4, 1994 Foxwoods Resort Casino, Ledyard, Connecticut, U.S. For vacant IBO heavyweight title
19 Win 18–1 Muhammad Askai TKO 2 Jun 25, 1994 Revere, Massachusetts, U.S.
18 Win 17–1 Julius Francis KO 4 (8), 2:38 May 25, 1994 Colston Hall, Bristol, England
17 Win 16–1 Carl Williams PTS 6 Nov 27, 1993 Masonic Auditorium, Cleveland, Ohio, U.S.
16 Win 15–1 Cordwell Hylton PTS 6 Nov 3, 1993 Whitchurch Leisure Centre, Bristol, England
16 Loss 14–1 Sergei Kobozev SD 10 Aug 12, 1993 Casino Magic, Bay St. Louis, Mississippi, U.S.
14 Win 14–0 Exum Speight UD 8 Jun 25, 1993 Athletic Club, Chelsea, Massachusetts, U.S.
13 Win 13–0 George Chambers KO 1 Apr 30, 1993 Chelsea, Massachusetts, U.S.
12 Win 12–0 Mark Sonnier TKO 1 Apr 16, 1993 Cyclorama Building, Boston, Massachusetts, U.S.
11 Win 11–0 Juan Quintana PTS 6 Apr 3, 1993 Somerville, Massachusetts, U.S.
10 Win 10–0 Lorenzo Poole KO 1 Mar 20, 1993 Revere, Massachusetts, U.S.
9 Win 9–0 Derrick Jones TKO 1 Mar 5, 1993 Boston, Massachusetts, U.S.
8 Win 8–0 Phil Prince KO 1 Feb 20, 1993 Boston, Massachusetts, U.S.
7 Win 7–0 Miguel Rosa TKO 2 Jan 30, 1993 Commonwealth Armory, Boston, Massachusetts, U.S.
6 Win 6–0 John Basil Jackson PTS 6 Jan 16, 1993 Belmont, New Hampshire, U.S.
5 Win 5–0 Jesus Rohena TKO 1, 1:46 Dec 10, 1992 Teachers Union Hall, Boston, Massachusetts, U.S.
4 Win 4–0 John Basil Jackson PTS 6 Nov 13, 1992 Revere, Massachusetts, U.S.
3 Win 3–0 Barry Kirton TKO 2 Nov 3, 1992 Foxwoods Resort Casino, Ledyard, Connecticut, U.S.
2 Win 2–0 Mike Vasser KO 1 Sep 12, 1992 Wonderland Greyhound Park, Revere, Massachusetts, U.S.
1 Win 1–0 Kevin Parker UD 4 Aug 20, 1992 Etess Arena, Atlantic City, New Jersey, U.S.

See also

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References

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[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

John Ruiz

View on Grokipedia
from Grokipedia
John Ruiz (born January 4, 1972) is an American former professional boxer who competed from 1992 to 2010, renowned as a two-time World Boxing Association (WBA) heavyweight champion and the first Latino to hold a world heavyweight title. Born in Methuen, Massachusetts, Ruiz earned the nickname "The Quiet Man" for his reserved demeanor outside the ring, contrasting his relentless, pressure-fighting style inside it. With a professional record of 44 wins, 9 losses, and 1 draw—including 30 knockouts—his career spanned 54 fights, marked by durability and tactical prowess in the heavyweight division. Ruiz captured his first WBA heavyweight title in March 2001 by defeating Evander Holyfield via unanimous decision in a grueling 12-round bout, becoming a historic figure as the inaugural Hispanic heavyweight world champion. He retained the belt in a controversial draw rematch with Holyfield later that year but lost it to Roy Jones Jr. in 2003. Ruiz regained the title in December 2004 with a victory over Fres Oquendo and briefly held it again in 2005 after a no-contest against James Toney (due to Toney's positive drug test), before losing to Nikolai Valuev in December 2005. Key setbacks included defeats to Roy Jones Jr. in 2003 and David Haye in 2010, the latter prompting his retirement. Post-retirement, Ruiz transitioned into boxing promotion, leveraging his experience to support emerging fighters.

Early life

Birth and upbringing

John Ruiz was born on January 4, 1972, in , to Puerto Rican parents. Shortly after his birth, the family relocated to , where Ruiz spent his early childhood until the age of six, when his parents divorced. His mother, Gladys Martínez Morales, then brought her four children back to the , settling in the working-class community of . As a second-generation Puerto Rican-American, Ruiz was raised in a single-parent household marked by financial hardship, with his mother taking multiple low-paid jobs to support the family. Growing up in Chelsea's tough urban neighborhood—a characterized by and socioeconomic challenges—these circumstances fostered his resilience and from a young age. Ruiz attended local schools in Chelsea and graduated from Chelsea High School, forgoing any formal higher education thereafter. His Puerto Rican heritage would later underscore his identity as the first Latino boxer to claim a world heavyweight title.

Introduction to boxing

John Ruiz, raised in the working-class city of , discovered as a means to navigate the challenges of his urban upbringing, where street life posed significant risks for young people. Introduced to the sport at age eight by his stepfather, Junior, who took him to the Parish Street Gym in nearby , Ruiz initially trained by hitting bags and in the ring to build discipline and physical conditioning. He continued sporadically until age 13, when the rigorous training led him to quit temporarily in favor of other sports, only to restart at 17 in 1989 after a physically exhausting street altercation that highlighted the need for a structured outlet to channel his energy and avoid further troubles. Upon recommitting to , Ruiz trained under local mentors at the Somerville Boxing Club in Union Square, just outside Chelsea, where coaches Gabe Mari and quickly identified his potential as a prospect due to his size, resilience, and natural power. These early influences emphasized fundamental techniques, helping Ruiz develop the required for the sport while fostering a in the gym environment. Their guidance was pivotal in transitioning him from casual participation to serious pursuit, recognizing his ability to absorb punishment and maintain composure under pressure. Ruiz's amateur beginnings involved initial local bouts competing as a , where he honed essential skills such as durability against heavier punches and improved footwork for positioning in the ring. These early matches in gyms allowed him to build confidence and technical proficiency without the intensity of national competitions, focusing on steady progress in a division that suited his frame at the time. Throughout his early training, Ruiz drew motivation from his Puerto Rican heritage, aiming to honor his roots by excelling in a sport where Latinos had limited representation at the highest levels. This cultural pride fueled his dedication, positioning boxing not just as personal redemption but as a way to represent and elevate his community's legacy in the heavyweight ranks.

Amateur career

Key amateur competitions

Ruiz compiled an impressive amateur record of 50 wins and 5 losses, establishing himself as a promising light heavyweight contender in the U.S. boxing scene. His achievements included multiple national-level successes that showcased his competitive edge against top domestic talent. A highlight of his amateur career was his participation in the 1991 AIBA World Championships in Sydney, Australia, where he represented the United States as a light heavyweight. Ruiz opened with a dominant 22-11 points victory over Algeria's Mohamed Benguesmia in the first round, followed by a referee-stopped contest in the third round against Yugoslavia's Miodrag Radulovic in the round of 16. He advanced to the quarterfinals but fell to Cuba's Ariel Hernández by a narrow 3-2 points decision. In the consolation bracket, he suffered another close loss, 2-3 points, to the Soviet Union's Andrey Kurnyavka. This performance marked him as one of the top American amateurs internationally, despite not medaling. Domestically, Ruiz excelled in regional and national tournaments, securing the gold medal at the 1991 U.S. Olympic Festival by defeating Denard Trapp in the light heavyweight final. He also reached the final of the 1991 U.S. National tournament, where he was defeated by Jeremy Williams, earning runner-up honors. In 1992, Ruiz claimed the New England light heavyweight championship, further solidifying his reputation in amateur circles. These victories highlighted his ability to perform under pressure in high-stakes events. Throughout his amateur tenure, Ruiz trained with the U.S. national team. These experiences allowed him to refine his techniques against diverse styles, contributing to his development as a resilient competitor.

Olympic trials and outcomes

Ruiz, building on his promising amateur record that included competing at the , entered the 1992 U.S. Olympic Boxing Trials as a . The trials followed a multi-stage qualification process, encompassing Eastern and Western regional events along with at-large selections, before converging at the national tournament in , from June 10 to 14. Securing an berth, the 20-year-old Ruiz advanced to the semi-finals, where he encountered future professional Jeremy Williams in a grueling bout that tested his endurance over multiple rounds. Ruiz fell short by (0:5), as Williams dominated the scoring. Williams went on to claim the title at the trials by defeating in the final (34:17), earning a place on the U.S. team for the Olympics. The narrow defeat proved a turning point, leaving Ruiz deeply disappointed and prompting him to forgo additional endeavors. At age 20, he transitioned immediately to the ranks, debuting successfully on August 20, 1992.

Professional career

Debut and early fights

John Ruiz made his debut on August 20, 1992, at the Trump Taj Mahal in , where he defeated Kevin Parker by over six rounds. At 20 years old and weighing in as a , Ruiz demonstrated composure and technical skill in his first paid bout, outpointing the experienced Parker on the undercard of a larger event. Building on this start, Ruiz embarked on an impressive streak, securing 13 consecutive victories—all but one by —between late 1992 and mid-1993, compiling an undefeated 14-0 record with 13 stoppages. Most of these early fights took place regionally in venues such as Revere, , and Mashantucket, , against modest opposition that allowed him to hone his aggressive inside fighting. Notable stoppages included first-round TKOs over John Basil Jackson in November 1992 and multiple opponents in quick succession during 1993, such as Phil Prince, Derrick Jones, and Lorenzo Poole, all ending in the opening round. His background as a provided a strong foundation for this rapid professional adaptation, enabling him to transition effectively while building power. Ruiz's first professional loss occurred on August 24, 1993, a controversial defeat to Sergey Kobozev over 10 rounds in Bay Saint Louis, , marking his move to tougher competition outside the region. He rebounded with key wins, including a over former heavyweight title challenger Carl Williams on November 10, 1993, in , , going the 10-round distance for the first time since his debut. From 1994 to 1996, Ruiz continued fighting regionally and internationally, including bouts in the , adding 11 more victories (eight by ) while suffering two additional losses: a to Danell Nicholson in August 1994 and a first-round to in March 1996. By the end of 1996, his record stood at 29-3 with 24 knockouts. During this period, Ruiz fully transitioned to the heavyweight division, evolving his style to emphasize relentless body punching and high stamina, which allowed him to break down taller opponents through sustained pressure rather than one-punch power. This approach, reminiscent of Rocky Marciano's forward-marching aggression, was evident in his high knockout rate early on and set the stage for his later contention.

Rise to heavyweight contention

Following the devastating first-round loss to on March 15, 1996, Ruiz made crucial tactical adjustments, shifting to a more defensive, clinch-oriented style that emphasized jabbing from the outside and body work to mitigate risks against power punchers. This evolution helped him avoid further early stoppages and build resilience in longer bouts. From 1997 to early 2000, Ruiz achieved a 7-0 record against progressively ranked opponents, demonstrating improved durability and ring generalship. Notable victories included a over on January 14, 1997, and a first-round of Ray Anis on June 17, 1997. A pivotal moment came on January 31, 1998, when Ruiz won the vacant NABF title by stopping former IBF champion via 11th-round TKO, outlasting the 56-7 veteran through relentless pressure and landing a decisive combination that prompted the referee's stoppage. This triumph elevated his profile significantly, as Tucker remained a respected name despite his age. Ruiz continued his ascent with wins over Jerry Ballard by unanimous decision in September 1998, Mario Cawley and Fernely Feliz by majority and unanimous decisions in March and June 1999, respectively, before capping the streak with a 10th-round of Thomas Williams on December 10, 1999—an upset stoppage against the 25-6 contender that highlighted Ruiz's improving punching power and signaled his readiness for elite competition. By mid-2000, these performances propelled Ruiz into the WBA's top 10 rankings, where he earned the #1 contender spot and a shot at the vacant WBA title against on August 12, 2000, marking his establishment as a legitimate force.

First WBA heavyweight title reign

John Ruiz won the vacant WBA title on March 3, 2001, defeating by unanimous decision over 12 rounds at the in , . The scores were 116-111, 115-112, and 114-113 in favor of Ruiz, who knocked Holyfield down in the 11th round and avenged a loss to the same opponent in August 2000. This victory marked Ruiz as the first Latino boxer to claim a major world championship. Ruiz made his first title defense on December 15, 2001, against Holyfield in a trilogy bout at in Mashantucket, , resulting in a split draw with scores of 114-114, 116-112 for Holyfield, and 115-113 for Ruiz, allowing him to retain the belt. In his second defense on July 27, 2002, Ruiz faced undefeated contender at the Events Center in , winning by disqualification in the 10th round after Johnson committed repeated low blows, having already been deducted points earlier. Ruiz's third and final defense came on , 2002, against Jameel McCline at in , where he secured a 10th-round technical knockout after dropping McCline with body shots. Ruiz held the WBA heavyweight title from March 2001 until March 1, 2003, completing three successful defenses during his initial reign. Throughout this period, his fighting approach emphasized inside fighting, body work, and clinching to neutralize opponents' power, which proved effective in maintaining control but frequently drew criticism for resulting in slow-paced, unentertaining contests often described as "ugly."

Defeat by Roy Jones Jr.

On March 1, 2003, at the Thomas & Mack Center in Las Vegas, Nevada, WBA heavyweight champion John Ruiz faced light heavyweight titleholder Roy Jones Jr. in a 12-round bout billed as "Never Take a Heavyweight Lightly." Jones, moving up two weight classes, weighed in at 193 pounds while Ruiz tipped the scales at 226 pounds, highlighting the size disparity. In the fight, Ruiz applied early pressure and wobbled Jones in the first round, but Jones recovered, breaking Ruiz's nose in the fourth and dominating with superior speed and footwork. Jones landed 134 of 424 punches (32% accuracy) compared to Ruiz's 89 of 433 (21%), outboxing his heavier opponent en route to a unanimous decision victory with scores of 116-112, 117-111, and 118-110. The outcome sparked controversy, primarily surrounding Jones's weigh-in and promotional efforts. Jones appeared at the official weigh-in dressed in a sweat suit and , registering at 193 pounds—a figure some suspected was inflated due to possible padding or weights in his clothing, as he was known to cut significant weight post-weigh-in. Ruiz and his camp expressed frustration over Jones's perceived lack of commitment to promoting the event, with Ruiz complaining bitterly about unequal efforts in building hype for the matchup. While Jones was praised for his technical mastery and speed against a larger foe, critics noted the wide scorecards did not fully reflect Ruiz's effective pressure and body work in several rounds, fueling debates about the decision's fairness despite the general consensus of Jones's win. In the immediate aftermath, Ruiz lost his WBA heavyweight title, becoming the organization's number-one contender. No formal protests altered the result, but the defeat underscored Ruiz's challenges against elite, faster opponents while demonstrating his durability—he absorbed heavy punishment, including a bloodied and swollen face, yet went the distance against one of boxing's pound-for-pound best. This loss highlighted Ruiz's resilience in the heavyweight division, where he continued to compete at a high level against top competition, refusing to be deterred by setbacks against superior athleticism.

Second WBA heavyweight title reign

Following his unanimous decision victory over Hasim Rahman on December 13, 2003, for the WBA interim heavyweight title, John Ruiz was elevated to full champion on February 20, 2004, after Roy Jones Jr. vacated the belt to return to light heavyweight. This marked the beginning of Ruiz's second reign as WBA heavyweight champion, coming less than a year after his setback loss to Jones Jr. in March 2003. Ruiz's first defense came on April 17, 2004, against mandatory challenger Fres Oquendo at in New York. The bout was a grueling affair characterized by clinches and low activity, drawing boos from the crowd, but Ruiz rallied in the later rounds to secure a technical knockout victory at 2:33 of the 11th round when Oquendo's corner threw in the towel amid a barrage of punches. This win solidified Ruiz's grip on the title amid ongoing WBA politics, including disputes over mandatory obligations and the lingering effects of the organization's "super champion" designation previously held by Jones. In his second defense on November 13, 2004, also at , Ruiz faced in a highly anticipated matchup billed as "Struggle for Supremacy." The fight featured intense exchanges, with Golota scoring two knockdowns, but Ruiz's relentless pressure and effective body work led to a controversial victory (114-111, 114-111, 113-112). The outcome drew criticism for favoring Ruiz's activity over Golota's power, highlighting the subjective challenges of scoring Ruiz's pressure-fighting style against mandatory contenders ranked by the WBA. Ruiz's third defense occurred on April 30, 2005, against at . Toney dominated with superior boxing, securing a (116-111, 116-111, 115-112), but the result was overturned to a no-contest on May 17, 2005, after Toney tested positive for , a banned steroid; Ruiz was reinstated as champion. This episode exemplified the reign's political turbulence, as WBA rules on drug testing and mandatory defenses complicated Ruiz's preparations amid the physical wear from back-to-back wars. He held the title through three such defenses until December 17, 2005, by which time the cumulative toll of high-volume, close-range battles had visibly slowed his once-durable frame.

Loss to Nikolai Valuev

On December 17, 2005, John Ruiz defended his WBA title against the undefeated at the Max-Schmeling-Halle in , , in a 12-round bout that ended in a controversial victory for the 7-foot, 324-pound Russian challenger. The judges scored it 116-114 and 116-113 for Valuev, with the third card reading 114-114, allowing the towering fighter to claim the belt on his first attempt at world championship gold while Ruiz, who weighed in at 238 pounds, dropped to 41-5-1. statistics underscored the contentious nature of the outcome, showing Ruiz landing 195 of 491 punches (40% accuracy) compared to Valuev's 157 of 607 (26%), including a significant edge in power punches at 128 to 43. The fight drew immediate accusations of bias from Ruiz's camp, who pointed to the Berlin venue—Valuev's adopted European base—as contributing to a pro-challenger atmosphere that influenced the scoring, with the crowd booing the decision and Ruiz himself declaring post-fight that he had been "robbed." employed his signature pressure style, using clinches and body work to neutralize Valuev's height advantage, but the Russian's long jab and reach frustrated the champion, leading to a tactical, low-output affair marred by holding and infighting. In the later rounds, Valuev inflicted visible damage on , opening cuts and causing fatigue that hampered the American's output, marking a physical toll that many observers linked to the onset of his career decline. In the immediate aftermath, Ruiz's manager, , sparked a ringside altercation by attempting to seize the title belt, while the fighter's team formally petitioned the WBA for a rematch, citing the lopsided punch stats and perceived judging irregularities. Although the sanctioning body acknowledged the controversy and initially signaled support for an immediate voluntary rematch, Ruiz ultimately chose to explore other opportunities amid stalled negotiations, effectively concluding his second WBA heavyweight reign after four defenses.

Comeback attempts

Following his majority decision loss to in December 2005, which stripped him of the WBA , John launched a series of comeback efforts aimed at reclaiming contention status. In November 2006, challenged in a WBA eliminator bout in , . The 12-round fight was competitive, with landing effective body shots and showing resilience, but Chagaev's higher volume and cleaner combinations prevailed, resulting in a victory for Chagaev (scores: 117-111, 116-112, 115-114). This setback dropped from the top 10 to around 14th in major rankings, highlighting the challenges of his mid-30s age (34 at the time) in maintaining elite output against younger contenders. To revitalize his career, Ruiz made adjustments to his training regimen, emphasizing a shift from his traditional clinch-heavy style to more aggressive punching, particularly to the body, under the guidance of his longtime team led by manager . These changes yielded immediate results in October 2007, when he faced Otis Tisdale in . Ruiz dominated with sharp combinations, securing a second-round TKO at 0:45 after battering Tisdale to the body and prompting referee intervention. This was Ruiz's quickest stoppage since 1996 and signaled a "new" version of the fighter, more offensive and fan-friendly, boosting his momentum and restoring him to top-10 rankings across sanctioning bodies. Building on this, Ruiz targeted veteran Jameel McCline in a March 2008 WBC title eliminator in Cancun, . Over 12 rounds, Ruiz used his improved jab and inside work to outpoint McCline, winning a unanimous decision (scores: 118-110, 117-111 twice) despite occasional clinches. The victory positioned Ruiz as the WBC mandatory challenger for champion and elevated him back into the top 5 of composite rankings, though mandatory obligations occasionally sidelined him from preferred matchups. At 36, however, Ruiz's reduced hand speed and recovery between rounds became evident, factors that his coaches sought to address through enhanced conditioning, yet these limited his explosiveness in prolonged exchanges.

Final bouts and retirement

In late 2009, Ruiz secured a tune-up victory over Serin on November 28 in , , winning by third-round technical knockout when Serin's corner threw in the towel after Ruiz landed a series of body shots. This fight served as preparation for his bid at a third world title. Ruiz's final professional bout occurred on April 3, 2010, at the M.E.N. Arena in , , where he challenged for the WBA championship. Haye dominated the contest, dropping Ruiz multiple times before the referee stopped the fight in the ninth round via technical knockout at 2:01, handing Ruiz his ninth career defeat. On April 26, 2010, Ruiz officially announced his retirement at age 38, stating it was time to begin a new chapter focused on family and community involvement, including plans to open a gym in . He reflected on the physical toll of the sport and the evolution of the heavyweight division, noting that despite his efforts to claim a third title, the recent loss underscored the challenges of continuing at the elite level. Ruiz concluded his 18-year career with a record of 44 wins, 9 losses, and 1 draw (30 knockouts), having competed in 12 world title fights as the first Latino champion.

Post-retirement activities

Gym ownership and training

Following his retirement from in 2010, John Ruiz transitioned into gym ownership, opening Quietman Sports Gym in 2011 inside at 4000 Mystic Valley Parkway in , a suburb near his hometown of Chelsea. The facility, co-owned and operated by Ruiz and his brothers Edward and David, was named after his longtime ring moniker, "The Quietman," and serves as a full-contact multi-fighting equipped with a and MMA cage. It provides training in , , wrestling, jiu-jitsu, , , self-defense, and youth programs such as kids' kung-fu and boot camps, catering to all ages and skill levels. Ruiz's training philosophy at the draws directly from his own experiences, prioritizing the fundamentals of technique, such as proper form on the speed bag and safe entry into to prevent injury, while fostering and resilience. He emphasizes that success in combat sports requires getting up after setbacks, mirroring the perseverance he displayed in his 19-year professional tenure, and views the as a developmental space that builds character through competitive yet supportive environments. Central to this approach is youth development, aiming to offer children a constructive outlet similar to the Somerville Boxing Club that shaped Ruiz's early , with the goal of nurturing future Olympians and community leaders while promoting holistic growth in physical, mental, and . As chief boxing instructor, has mentored a range of local amateur and professional fighters at the gym, including prospects of Puerto Rican descent who train under his guidance alongside instructors like Eddie Rivera and "Raul" Cetina. The program focuses on building well-rounded athletes capable of competing in both and MMA, with also promoting events through his American Fighting Organization to provide platforms for his trainees. By the mid-2010s, had relocated his personal residence to , where he continues to maintain active involvement in the gym's operations remotely, overseeing training and community initiatives from afar.

Philanthropy and public appearances

Following his retirement from professional boxing in 2010, John Ruiz has engaged in various philanthropic efforts, particularly those supporting disaster relief and . In 2017, as a Puerto Rican-American whose family endured the impacts of , Ruiz organized the "Latino Boxers for Hurricane Relief" initiative to aid recovery on the island. He led efforts to collect and deliver essential supplies to his family's hometown, which continued to face significant challenges months after the storm, drawing on his personal connections to mobilize donations from the boxing community. Ruiz has remained active in public appearances that promote and youth development. On March 6, 2025, he served as the special guest of honor at the final night of the 78th Annual tournament in , where he supported emerging fighters and reflected on his own amateur roots in the region. As a resident of , since at least 2024, Ruiz has conducted youth sessions at the local (PAL), instructing children and emphasizing discipline and fitness as pathways to personal growth. He has also participated in events tied to boxing heritage, including his 2014 induction into the Boxing Hall of Fame, where he delivered remarks on perseverance in the sport during the gala ceremony. These engagements often stem from Ruiz's commitment to repaying the communities that shaped his early life, such as , where a public park was dedicated in his honor in 2014 as a symbol of giving back through success.

Legacy

Championships and records

John Ruiz captured the WBA twice, first on March 3, 2001, when he defeated by unanimous decision over 12 rounds to claim the vacant championship, and again on December 13, 2003, via unanimous decision over . His first reign lasted until March 1, 2003, and the second until December 17, 2005, making him the first Latino boxer to win a world . Across his two reigns, Ruiz made four successful defenses of the WBA heavyweight title. In the first reign, he retained the belt via draw against Holyfield on December 1, 2001, and by disqualification victory over on July 20, 2002, after Johnson was penalized for repeated low blows. During the second reign, Ruiz stopped Fres Oquendo in the 11th round on April 10, 2004, and won a over on November 20, 2004. These defenses highlighted his durability and pressure-fighting style in key bouts, including his victories over Holyfield. Ruiz concluded his professional career with a record of 44 wins (30 by knockout), 9 losses, 1 draw, and 1 no contest across 55 bouts from 1992 to 2010. CompuBox data from several of his fights, such as the 2003 loss to Roy Jones Jr. where he threw 433 punches, underscored his reputation for high-volume punching among heavyweights. In recognition of his achievements, Ruiz was inducted into the Connecticut Boxing Hall of Fame in 2014.

Influence on Latino boxers

John Ruiz's achievement as the first Latino boxer to capture a world heavyweight title in 2001 marked a pivotal moment for representation in a division long dominated by non-Latino fighters, shattering barriers and opening pathways for future generations of athletes in . As a Puerto Rican-American from , Ruiz's two WBA title reigns served as foundational accomplishments that highlighted the potential for Latino success at the sport's highest levels. Ruiz's cultural significance extended beyond the ring, as he actively embraced and promoted his Puerto Rican heritage, drawing widespread support from the island's community after his victory over . Thousands of fans in welcomed him with a parade from San Juan to Bayamón's Coliseo , underscoring his role in bridging U.S.-born Latino identity with island pride and fostering greater visibility for boxers in global media. His advocacy in interviews emphasized the importance of cultural roots, inspiring young Latinos in communities like Chelsea to pursue as a viable path to achievement. Through his trailblazing success, Ruiz influenced a new generation of Latino heavyweights, most notably paving the way for fighters like , who became the second Latino to claim a crown in 2019 and cited the division's historical lack of representation that John Ruiz helped address. Ruiz's own post-retirement gym in has further extended this mentorship, training aspiring boxers and reinforcing durability and resilience as key traits for success in the class. As of 2025, Ruiz continues to support the sport by appearing at events like the Golden Gloves tournament. Despite facing criticism for his defensive, clinch-heavy style often labeled as "boring" by media and fans, Ruiz demonstrated the enduring value of tactical durability, absorbing punishment across 55 professional bouts while securing victories against elite opponents and proving that strategic grit could sustain a championship career. This perseverance not only validated alternative approaches in heavyweight boxing but also motivated Latino fighters to prioritize endurance over flash, contributing to a broader shift in perceptions of the division's diversity.

Professional boxing record

John Ruiz's professional boxing record consists of 55 bouts: 44 wins (30 by knockout), 9 losses, 1 draw, and 1 no contest.
No.ResultRecordOpponentTypeRd., TimeDateLocationNotes
1Win1–0Kevin ParkerKO1 (4), 2:321992-08-20Trump Taj Mahal, Atlantic City, New JerseyPro debut
2Win2–0Mike VasserKO1 (4), 1:481992-09-24Wonderland Greyhound Park, Revere, Massachusetts
3Win3–0Barry KirtonKO2 (4), 1:151992-11-10Foxwoods Resort Casino, Ledyard, Connecticut
4Win4–0John Basil JacksonKO1 (4), 2:151992-11-24Wonderland Ballroom, Revere, Massachusetts
5Win5–0Jesus RohenaKO1 (4), 0:551992-12-15Teachers Union Hall, Boston, Massachusetts
6Win6–0John Basil JacksonKO1 (4)1993-01-26Belmont, Massachusetts
7Win7–0Miguel RosaKO1 (4), 0:451993-01-26National Guard Armory, Chelsea, Massachusetts
8Win8–0Phil PrinceKO1 (4), 1:251993-02-23Suffolk Downs, Boston, Massachusetts
9Win9–0Derrick JonesKO1 (4), 2:001993-03-23Whitman Armory, Whitman, Massachusetts
10Win10–0Lorenzo PooleKO1 (4), 2:451993-03-23Wonderland Greyhound Park, Revere, Massachusetts
11Win11–0Juan QuintanaKO1 (4), 1:151993-04-13Somerville, Massachusetts
12Win12–0Mark SonnierKO1 (4), 1:301993-04-13Cyclorama Building, Boston, Massachusetts
13Win13–0George ChambersKO1 (4), 0:301993-04-13National Guard Armory, Chelsea, Massachusetts
14Win14–0Exum SpeightKO2 (6), 2:251993-06-15Chelsea Armory, Chelsea, MassachusettsSpeight down twice in round 2
15Loss14–1Sergey KobozevUD101993-08-24Casino Magic, Bay St. Louis, Mississippi
16Win15–1Cordwell HyltonKO1 (6), 2:551993-11-10Whitchurch Sports Centre, Bristol, England
17Win16–1Carl WilliamsKO2 (8), 2:591993-11-23Masonic Auditorium, Cleveland, Ohio
18Win17–1Julius FrancisKO2 (8), 2:481994-05-10Colston Hall, Bristol, England
19Win18–1Muhammad AskiaKO1 (8), 2:451994-06-21Revere, Massachusetts
20Loss18–2Danell NicholsonUD101994-08-23Foxwoods Resort Casino, Ledyard, Connecticut
21Win19–2Rick SullivanKO1 (10), 2:351994-10-25The Roxy, Boston, Massachusetts
22Win20–2Boris PowellKO1 (10), 2:181995-02-21Silver Nugget, North Las Vegas, Nevada
23Win21–2Jack BastingKO2 (10), 2:551995-03-14York Hall, Bethnal Green, England
24Win22–2Michael MurrayKO1 (10), 2:301995-05-23Ipswich, England
25Win23–2Derrick RoddyKO1 (10), 1:551995-06-13Elephant & Castle Centre, Southwark, England
26Win24–2Willie JacksonKO1 (10), 2:451995-08-15Somerville, Massachusetts
27Win25–2Steve PannellKO2 (10), 2:151995-10-24Convention Center, Atlantic City, New Jersey
28Loss25–3David TuaTKO9 (10), 1:101996-03-29Convention Hall, Atlantic City, New Jersey
29Win26–3Doug DavisKO1 (10), 1:451996-06-25The Roxy, Boston, Massachusetts
30Win27–3Greg PickromKO1 (10), 2:201996-07-23The Roxy, Boston, Massachusetts
31Win28–3Nathaniel FitchKO1 (10), 0:451996-10-22The Roxy, Boston, Massachusetts
32Win29–3Yuri YelistratovTKO3 (10), 0:011996-11-12York Hall, Bethnal Green, EnglandYelistratov retired due to cut
33Win30–3James ThunderKO2 (10), 2:551997-01-21Hale Arena, Kansas City, Missouri
34Win31–3Ray AnisKO1 (10), 1:301997-06-24Casino Magic, Bay St. Louis, Mississippi
35Win32–3Tony TuckerUD101998-01-20Ice Palace, Tampa, Florida
36Win33–3Jerry BallardKO1 (10), 2:001998-09-19Georgia Dome, Atlanta, Georgia
37Win34–3Mario CawleyKO1 (10), 2:451999-03-27Madison Square Garden, New York City, New York
38Win35–3Fernely FelizKO1 (10), 1:151999-06-26William J. McGuigan Shrine Auditorium, Wilmington, Massachusetts
39Win36–3Thomas WilliamsKO1 (10), 2:101999-12-18Grand Casino, Tunica, Mississippi
40Loss36–4Evander HolyfieldUD122000-08-12Paris Hotel & Casino, Paradise, NevadaFor WBA heavyweight title
41Win37–4Evander HolyfieldUD122001-03-03Mandalay Bay Events Center, Paradise, NevadaWon WBA heavyweight title
42Draw37–4–1Evander HolyfieldSD122001-12-15Foxwoods Resort Casino, Ledyard, ConnecticutRetained WBA heavyweight title
43Win38–4–1Kirk JohnsonTKO10 (12), 2:552002-07-27Mandalay Bay Events Center, Paradise, NevadaRetained WBA heavyweight title
44Loss38–5–1Roy Jones Jr.UD122003-03-01Thomas & Mack Center, Paradise, NevadaFor WBA heavyweight title
45Win39–5–1Hasim RahmanUD122003-12-13Boardwalk Hall, Atlantic City, New JerseyWon vacant WBA heavyweight title
46Win40–5–1Fres OquendoUD122004-12-13Madison Square Garden, New York City, New YorkRetained WBA heavyweight title
47Win41–5–1Andrew GolotaTKO10 (12)2004-11-13Madison Square Garden, New York City, New YorkRetained WBA heavyweight title; Ruiz down twice in round 2
48NC41–5–1 (1)James ToneyNC9 (12)2005-04-30Madison Square Garden, New York City, New YorkOriginally a win for Ruiz, overturned by NYSAC; Ruiz down in round 7
49Loss41–6–1Nikolai ValuevMD122005-12-17Max-Schmeling-Halle, Berlin, GermanyLost WBA heavyweight title
50Loss41–7–1Ruslan ChagaevUD122006-11-11Burg-Wächter Castello, Cologne, GermanyWBA heavyweight title eliminator
51Win42–7–1Otis TisdaleTKO6 (10), 1:232007-10-27Sears Centre, Hoffman Estates, Illinois
52Win43–7–1Jameel McClineTKO11 (12), 1:302008-03-08Plaza de Toros, Cancún, MexicoWBC heavyweight title eliminator
53Loss43–8–1Nikolai ValuevUD122008-08-30Max-Schmeling-Halle, Berlin, GermanyFor WBA heavyweight title
54Win44–8–1Adnan SerinTKO6 (10), 2:002009-11-07Arena Nürnberger Versicherung, Nuremberg, GermanySerin's corner threw in towel
55Loss44–9–1David HayeTKO9 (10), 1:412010-04-10M.E.N. Arena, Manchester, EnglandFor WBA heavyweight title; Ruiz down multiple times; Haye deducted 1 point in round 9

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  73. https://www.lowellsun.com/2025/02/15/former-heavyweight-champion-john-ruiz-to-make-lowell-appearance/
  74. https://www.reddit.com/r/Boxing/comments/awii1h/was_john_ruiz_that_bad_of_a_heavyweight_boxer/
  75. https://ringsidereport.com/?p=1906
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