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Kenneth Merrill Kelly (born October 14, 1988) is an American professional baseball pitcher for the Arizona Diamondbacks of Major League Baseball (MLB). He has previously played in MLB for the Texas Rangers, and in the KBO League for the SK Wyverns.

Key Information

Early life and education

[edit]

Kelly lived in Lake Forest, Illinois from grades three to eight.[1] He also spent early years in Bryn Mawr, Pennsylvania, a Philadelphia suburb before relocating to Scottsdale, Arizona and attending Desert Mountain High School.[2]

The Baltimore Orioles selected Kelly in the 37th round of the 2007 Major League Baseball (MLB) draft, but he did not sign a contract. He attended Yavapai College. After playing college baseball at Yavapai for two years, the Cleveland Indians took him in the 22nd round of the 2009 MLB draft, but again, he did not sign. He transferred to Arizona State University, where he played for the Arizona State Sun Devils in 2010.[3]

Professional career

[edit]

Tampa Bay Rays

[edit]

The Tampa Bay Rays selected Kelly in the eighth round (251st overall) of the 2010 MLB draft.[4] Kelly advanced about one minor league level each season, beginning his career at Low-A in 2010 and reaching Triple-A for the first time in 2013. He split his first professional season between the Hudson Valley Renegades and the Bowling Green Hot Rods. He was 8–7 with a 3.28 ERA for the 2011 Charlotte Stone Crabs. He had an 8–3 record and a 3.57 ERA for the 2012 Montgomery Biscuits after being used primarily in relief. In 2013, he went 13–8 with 111 strikeouts and a 3.64 ERA in 28 games (26 starts) for the Biscuits and Triple-A Durham Bulls. He allowed only 128 hits in 158 1/3 innings. He was a non-roster invitee to 2014 spring training, but did not make the Opening Day roster.[5] He pitched the 2014 season for Durham, going 9–4 with a 2.76 ERA, but remained in the minor leagues.

SK Wyverns

[edit]

Kelly signed with the SK Wyverns of the Korea Baseball Organization (KBO) ahead of the 2015 season. In four seasons with SK Wyverns, Kelly pitched to a 48–32 record and a 3.86 ERA[4] while winning the 2018 Korean Series. In Game 3 of the series, he pitched seven innings allowing two runs to earn the win.[6] He became a free agent after the 2018 season.

Arizona Diamondbacks

[edit]

On December 4, 2018, MLB's Arizona Diamondbacks signed Kelly to a two-year major league contract.[7] On April 1, 2019, Kelly made his major league debut in a start versus the San Diego Padres. He earned a win and recorded a quality start by totaling six innings while allowing three runs and striking out three.[8] After struggling for much of the season, Diamondbacks' manager Torey Lovullo called Kelly into his office and issued a warning that he was considering sending him down. When Kelly asked why, Lovullo responded by saying, "You are statistically the worst pitcher in the National League." Kelly took this as a challenge to improve. He made some mechanical adjustments and flourished in September by going 4-1 with a 2.18 ERA in his last five starts.[9] Overall in his first season with Arizona, Kelly led the National League in losses with 14 but led the team in wins (13) and innings (183+1⁄3). Kelly began the 2020 season in the rotation before being shut down on September 1 after 5 starts due to a shoulder injury. He returned healthy in 2021 but posted a 7–11 record over 27 starts on a Diamondbacks squad that lost 110 games.

On April 1, 2022, Kelly signed a two-year, $18 million contract extension with the Diamondbacks.[10] He started the 2022 season with a 15-inning scoreless streak, three short of the franchise record to begin a season.[11] Kelly won the National League Pitcher of the Month Award for July 2022 after pitching to a 1.31 ERA in six starts.[12] He also won the National League Player of the Week Award for the week of July 25–31.[13]

In Game 2 of the 2023 World Series, Kelly pitched a historic game. He pitched seven innings, striking out nine batters without allowing a walk. He only allowed three hits and one run. Only seven other pitchers in World Series history had ever pitched seven or more innings with that many strikeouts and no walks. With the Diamondbacks eventually winning the game, Kelly became the first player to win a game in both the World Series and Korean Series. Kelly finished the 2023 postseason with a 3–1 record in four starts with a 2.25 ERA. [9]

In 2024, Kelly once more began the year as part of Arizona's rotation, logging a 2.19 ERA across his first four starts. He was placed on the injured list with a teres major muscle strain in his right shoulder on April 23, 2024.[14] Kelly was transferred to the 60–day injured list on May 2, after it was announced that he would miss more than a month as a result of the injury.[15] He was activated on August 11.[16] Kelly made 13 total starts for Arizona in 2024, posting a 5-1 record and 4.03 ERA with 63 strikeouts across 73+2⁄3 innings pitched.

Kelly made 22 starts for the Diamondbacks in 2025, compiling a 9-6 record and 3.22 ERA with 121 strikeouts across 128.2 innings pitched.[17]

Texas Rangers

[edit]

On July 31, 2025, the Diamondbacks traded Kelly to the Texas Rangers in exchange for Kohl Drake, Mitch Bratt, and David Hagaman.[18] In 10 starts for the Rangers, Kelly compiled a 3-3 record and 4.23 ERA with 46 strikeouts across 55+1⁄3 innings pitched.

Arizona Diamondbacks (second stint)

[edit]

On December 19, 2025, Kelly signed a two-year, $40 million contract to return to the Arizona Diamondbacks.[19] He was named the team's Opening Day starter in 2026, but began the season on the injured list.[20]

International career

[edit]

On October 6, 2022, Kelly announced that he would represent the United States national baseball team in the 2023 World Baseball Classic.[21] He started for the United States in the championship game against Japan and was credited with the loss.[22]

Personal life

[edit]

Kelly's wife Bre gave birth to their first child, a daughter, Hadley, in February 2022.[23][24]

Kelly is noted by some to have a striking physical resemblance to actor-comedian Chris Elliott.[25]

References

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Merrill Kelly

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from Grokipedia
Merrill Kelly (born October 14, 1988) is an American professional baseball pitcher for the Texas Rangers of Major League Baseball (MLB). A right-handed starter known for his command and changeup, Kelly has had a unique career trajectory that includes stints in the minor leagues and the Korea Baseball Organization (KBO) before establishing himself in MLB.[1][2] Born in Houston, Texas, Kelly attended Arizona State University, where he played college baseball for the Sun Devils from 2007 to 2010.[1] He was selected by the Tampa Bay Rays in the eighth round, 251st overall, of the 2010 MLB Draft and spent four seasons in their minor league system, reaching Triple-A in 2013 but failing to break into the majors.[1] Seeking greater opportunity, Kelly signed with the SK Wyverns of the KBO in 2014, debuting in 2015 and pitching there through 2018; over four seasons, he compiled a 48-32 record with a 3.86 ERA and 641 strikeouts, leading the league with 189 strikeouts in 2017 and contributing to the team's 2018 Korean Series championship with a 12-7 regular-season mark and two starts in the finals.[1][3] Kelly returned to the United States and signed a two-year, $5.5 million contract with the Arizona Diamondbacks ahead of the 2019 season, making his MLB debut on April 1 of that year.[1] In his first MLB campaign, he posted a 13-14 record with a 4.42 ERA over 32 starts, and he has since become a reliable rotation mainstay, highlighted by a career-best 12-8 mark and 3.29 ERA in 2023 that propelled the Diamondbacks to the World Series.[1] That postseason, Kelly excelled with a 3-1 record and 2.25 ERA across four starts, including a standout Game 2 World Series performance where he pitched seven innings, allowing one run on three hits while striking out nine Texas Rangers batters in a 9-1 Diamondbacks victory.[4] On July 31, 2025, midway through a strong season in which he went 12-9 with a 3.52 ERA and 167 strikeouts over 184 innings, Kelly was traded from the Diamondbacks to the Rangers in exchange for prospects Kohl Drake, Mitch Bratt, and David Hagaman.[5][6]

Early life and education

Early life

Kenneth Merrill Kelly was born on October 14, 1988, in Houston, Texas.[1] He is the son of Tom Kelly and Cheryl Kelly.[7] Born in Houston, Texas, Kelly's family relocated to the Philadelphia area, where he spent his early years before moving to Scottsdale, Arizona, where he spent much of his childhood.[8] During his time in the Philadelphia region, Kelly developed a passion for baseball as a young fan, cheering for the Philadelphia Phillies and attending the 1996 MLB All-Star Game at Veterans Stadium.[9]

High school

Kelly attended Desert Mountain High School in Scottsdale, Arizona, where he developed his skills as a right-handed pitcher on the varsity baseball team.[10] During his senior year in 2007, he served as team captain, demonstrating leadership on the field.[11] Kelly earned All-Region honors and participated in the Senior All-Star Game that year, highlighting his standout performance among local peers.[12] His talent attracted scouting attention, as the Baltimore Orioles selected him in the 37th round (1,112th overall) of the 2007 MLB Draft.[10] Despite the opportunity, Kelly opted to pursue college baseball, forgoing an immediate professional contract to further his education and development at Yavapai College.[13] He graduated from Desert Mountain High School in 2007.[11]

College

Kelly began his collegiate baseball career at Yavapai College in Prescott, Arizona, where he pitched for the Roughriders from 2008 to 2009.[7] During these two seasons, he contributed to back-to-back Arizona Community College Athletic Conference (ACCAC) titles and earned First Team All-ACCAC and All-Region honors in 2009.[7] Overall, Kelly posted a 15-1 record over 167.1 innings pitched, showcasing his rapid improvement as a right-handed pitcher.[14] In his freshman year of 2008, he went 5-0 with a 5.53 ERA in 70 innings, striking out 55 batters while issuing 17 walks.[14] His sophomore campaign in 2009 marked a breakout, as he achieved a 10-1 mark with a 1.48 ERA over 97.1 innings, fanning 88 batters.[14] Following his success at the junior college level, Kelly transferred to Arizona State University (ASU) in Tempe for his junior year in 2010, where he continued to develop into a reliable starting pitcher for the Sun Devils.[11] In 18 starts, he recorded a 10-3 record with a 4.23 ERA across 100 innings, striking out 78 while walking just 37 and holding hitters to a .258 average.[11] Kelly earned Honorable Mention All-Pac-10 honors and was named to the All-Tempe Regional Team for his contributions.[11] His performances were instrumental in helping ASU advance to the College World Series that season.[1] Kelly's strong junior year at ASU positioned him for professional baseball, as the Tampa Bay Rays selected him in the eighth round (251st overall) of the 2010 MLB Draft.[1]

Professional career

Tampa Bay Rays

Merrill Kelly was selected by the Tampa Bay Rays in the eighth round, 251st overall, of the 2010 Major League Baseball Draft out of Arizona State University.[1] Following the draft, the Rays signed Kelly to a professional contract and assigned him to their Short-Season A affiliate, the Hudson Valley Renegades, where he made his professional debut.[15] In 2010, Kelly split time between the Renegades and the full-season Single-A Bowling Green Hot Rods, appearing in 12 games (three starts) and posting a combined 1-2 record with a 4.30 ERA over 37.2 innings, striking out 29 batters while walking 17.[16] His performance in Hudson Valley was particularly strong, yielding a 1.42 ERA in seven relief outings, highlighting his early potential as a right-handed starter transitioning to professional ball.[17] Kelly's development continued steadily through the Rays' system, advancing roughly one level per season. In 2011, he joined the High-A Charlotte Stone Crabs of the Florida State League, where he established himself as a reliable starter, going 8-7 with a 3.28 ERA in 25 starts and leading the team with 129 innings pitched while recording 92 strikeouts.[1] This performance ranked him sixth in the league in ERA and second on the Stone Crabs in innings, demonstrating improved command and endurance.[18] By 2012, Kelly moved up to Double-A with the Montgomery Biscuits of the Southern League, primarily working out of the bullpen before transitioning to spot starts; he finished 8-3 with a 3.57 ERA across 32 appearances (nine starts), logging 88.1 innings and 61 strikeouts.[1] In 2013, Kelly split the season between Montgomery and the Triple-A Durham Bulls, earning a midseason promotion to the International League after posting a 5-5 record and 4.20 ERA in Double-A. At Durham, he posted 14 starts, achieving an 8-5 mark with a 3.01 ERA over 84 2/3 innings and 70 strikeouts, contributing to a combined 13-10 record and 3.64 ERA across 28 appearances (26 starts) that year.[1][16] Kelly returned to Durham full-time in 2014, embracing a swingman role with 28 outings (15 starts) and delivering one of his strongest minor league seasons: a 9-4 record, 2.76 ERA, and 114 innings pitched, with 89 strikeouts and a .236 opponent batting average.[18] His versatility and consistency in Triple-A underscored his growth, though he remained without a major league call-up. After five seasons in the Rays organization, Kelly was released by the Durham Bulls on December 17, 2014, concluding his affiliation with Tampa Bay without reaching the majors.[19] Over his minor league tenure with the Rays, Kelly compiled a 39-26 record with a 3.51 ERA in 142 appearances (78 starts), totaling 527.1 innings and 382 strikeouts, reflecting a solid but unremarkable path through the system.[16][20]

SK Wyverns

Following his release from the Tampa Bay Rays organization after the 2014 season, Merrill Kelly signed a one-year contract with the SK Wyverns of the Korea Baseball Organization (KBO) on December 18, 2014, for a salary of $250,000 plus a $100,000 signing bonus.[21][22] This move came as an alternative to continuing in minor league baseball, where his earnings would have been lower, and marked his introduction to professional baseball abroad. Kelly initially faced challenges adapting to the KBO's unique style, including faster-paced games, different mound dimensions, and cultural adjustments in South Korea; his first season in 2015 was uneven, with the Wyverns finishing fourth in the league at 69-74.[23] Over time, he renegotiated his contract annually, with salaries rising to $850,000 in 2016 and approximately $1.4 million by 2017, reflecting his growing value to the team.[24][25] Kelly's performance in the KBO improved steadily across his four seasons, establishing him as a reliable starter for the Wyverns. He focused on refining his command, reducing his walk rate from 3.5 BB/9 in his minor league career to 2.54 BB/9 overall in Korea, which enhanced his four-seam fastball, slider, and changeup arsenal.[26] The table below summarizes his key yearly statistics:
YearRecordERAStartsInnings PitchedStrikeouts
201511-104.1329181.0139
20169-83.6831200.1152
201716-73.6030190.0189
201812-74.0928158.1161
In 2017, Kelly led the KBO in strikeouts with 189, anchoring the Wyverns' rotation as they reached the postseason semifinals.[18] His workload—exceeding 180 innings in each of the first three seasons—demonstrated durability, contributing to the team's consistent contention in the league. Kelly played a pivotal role in the Wyverns' success during the 2018 season, his final year with the club, where he posted a 12-7 record and helped propel them to the KBO championship. The Wyverns defeated the Doosan Bears 4-2 in the Korean Series, with Kelly making two starts: he earned the win in Game 3 by pitching six scoreless innings and also started Game 6, allowing three runs over five innings in the clincher.[1][27][28] This title was the Wyverns' fourth in franchise history and highlighted Kelly's growth into a postseason performer, as his improved command limited opponents to a .280 batting average against in the series.[28] After the 2018 championship, Kelly opted to return to Major League Baseball, signing a two-year, $5.5 million major league contract with the Arizona Diamondbacks in December 2018, including club options for 2021 and 2022.[29] This decision was influenced by renewed MLB interest following his KBO success, though complicated by tax issues related to foreign player earnings in Korea that prevented an earlier return.[30]

Arizona Diamondbacks

Kelly signed a two-year major league contract with the Arizona Diamondbacks on December 4, 2018, marking his return to Major League Baseball after four seasons in the Korea Baseball Organization.[31] He earned a spot in the starting rotation during spring training and made his MLB debut on April 1, 2019, against the San Diego Padres at Petco Park, where he pitched 5.1 innings and allowed two runs in a 10-3 victory.[32] In his first season, Kelly posted a 13-14 record with a 4.42 ERA, 158 strikeouts over 29 starts and 183.1 innings, establishing himself as a reliable mid-rotation starter for the Diamondbacks.[1][10] He improved in 2020, limited by the shortened season to 11 starts with a 5-3 record and 2.42 ERA over 40 innings and 46 strikeouts, before a 2021 campaign of 7-11 with a 4.44 ERA, 130 strikeouts in 27 starts and 158 innings.[1][10] Kelly's performance peaked in 2022, going 13-8 with a 3.37 ERA, 177 strikeouts in 31 starts and 200.1 innings, helping anchor the rotation amid team transitions.[1][10] His 2023 season was a career highlight, earning his first All-Star selection after a 12-8 record, 3.29 ERA, and 187 strikeouts in 30 starts and 177.2 innings, ranking among National League leaders in innings pitched.[1][10] In the postseason, Kelly played a pivotal role in the Diamondbacks' World Series run, securing a 5-2 victory in Game 2 against the Texas Rangers on October 28 with seven innings of one-run ball, no walks, and nine strikeouts.[4] Through the 2024 season, Kelly accumulated 55 wins against 45 losses with a 3.78 ERA and 761 strikeouts over 141 starts with Arizona, solidifying his value as a durable veteran.[10] However, 2024 was marred by injury; he was placed on the 60-day injured list on April 23 with a teres major muscle strain in his right shoulder, limiting him to just 13 starts upon his August 11 return, where he went 5-1 with a 4.03 ERA and 63 strikeouts in 73.2 innings.[1] Entering 2025 recovered from the shoulder issue, Kelly delivered a strong first half, posting a 9-6 record with a 3.22 ERA, 121 strikeouts, and a 1.06 WHIP across 22 starts and 128.2 innings before the trade deadline.[5] On July 31, 2025, the Diamondbacks traded Kelly to the Texas Rangers in exchange for prospects Kohl Drake and Mitch Bratt, plus cash considerations, as part of a sell-off amid a disappointing season that left Arizona outside playoff contention.[5] The move provided immediate rotation depth for Texas but depleted Arizona's veteran presence, contributing to a reliance on younger arms for the remainder of the year.[33]

Texas Rangers

On July 31, 2025, the Texas Rangers acquired Merrill Kelly from the Arizona Diamondbacks at the trade deadline to strengthen their starting rotation amid a competitive AL West race.[33] Kelly was activated from the injured list the following day, August 1, and made his debut with Texas shortly thereafter.[1] In his 10 starts with the Rangers during the second half of the 2025 season, Kelly compiled a 3-3 record with a 4.23 ERA over 55.1 innings pitched, recording 46 strikeouts while issuing 17 walks.[10] He served as a reliable mid-rotation arm, providing stability to a pitching staff that helped the Rangers finish 81-81 and third in the AL West.[10] One standout performance came on August 24 against the Cleveland Guardians, where Kelly delivered 7 scoreless innings on 4 hits and 8 strikeouts to secure his first victory with Texas and complete a series sweep.[34] Following the conclusion of the 2025 season, Kelly elected free agency on November 2, becoming an unrestricted free agent at age 37.[1] As of November 19, 2025, he remains unsigned. This decision came after a full campaign that saw him post a combined 12-9 record, 3.52 ERA, and 167 strikeouts over 184 innings split between the two teams, underscoring his enduring value as a durable veteran starter.[10]

Personal life

Family

Merrill Kelly married Bre Kelly on December 1, 2018, in Phoenix, Arizona, shortly after his return from playing in South Korea with the SK Wyverns and coinciding with his signing of a two-year contract with the Arizona Diamondbacks.[35][29] The couple welcomed their first child, daughter Hadley, in February 2022, during the early months of Kelly's tenure with the Diamondbacks.[36][37] Their second child, son Hayes, was born in January 2025, adding to the family's dynamics amid Kelly's ongoing professional commitments.[38] Bre Kelly has provided steadfast support throughout Kelly's career transitions, including the relocation from South Korea back to Arizona in late 2018, where the couple established their home base in the Phoenix area following the marriage and contract signing.[39] Kelly has credited his family, particularly his time with Hadley and Hayes, for offering emotional grounding amid the rigors of the baseball season and relocations.[38] As of late 2025, with Kelly entering free agency after his stint with the Rangers, the family continues to reside in Arizona, where they prioritize a balanced routine that accommodates his athletic schedule and fosters everyday joys like family outings and milestones with the children.[40][38]

Community involvement

Merrill Kelly has been actively involved in charitable efforts supporting children with cancer through the Arizona Cancer Foundation for Children. In July 2025, he hosted a group of 12 children battling cancer at Chase Field for a special Jr. Diamondbacks Signing Session, where each child received a custom Topps baseball card featuring themselves and had the opportunity to sign autographs for Diamondbacks players, reversing the typical fan-player dynamic to boost their confidence and joy.[41][42] Kelly has also participated in initiatives addressing food insecurity in the Phoenix area. In June 2025, he joined the Arizona Diamondbacks' Hunger Awareness Day event at St. Mary's Food Bank in Phoenix, where he met with donors and helped collect milk contributions to support families in need, aligning with broader MLB efforts for humanitarian aid through partner organizations.[43][44] As a native of Scottsdale, Arizona, Kelly's journey from local high school baseball to Major League success has inspired youth athletes in the Phoenix Valley. Following the Diamondbacks' 2023 World Series appearance, his story of perseverance—rising from community college and international play—has been highlighted in local media as a motivational example for young players pursuing baseball dreams in Scottsdale and Phoenix.[13]

References

  1. Merrill Kelly Stats, Age, Position, Height, Weight, Fantasy & News
  2. Merrill Kelly Biography - ESPN
  3. https://www.chosun.com/english/sports-en/2025/11/06/3PNTRU6WSFDE7GCVW2JIXHVQWA/
  4. Merrill Kelly silences Rangers' bats as D-backs roll in Game 2 - ESPN
  5. Merrill Kelly #23 - The Official Site of Minor League Baseball
  6. Merrill Kelly 2025 pitching Stats Per Game - MLB - ESPN
  7. Player Bio: Merrill Kelly - Sun Devil Athletics | ASU
  8. Diamondbacks' Merrill Kelly settling in after long road from minors ...
  9. Merrill Kelly revisits Phillies crowd experience ahead of NLCS clash
  10. D'backs' Merrill Kelly says Phillies fans are less noisy compared to ...
  11. Merrill Kelly Stats, Height, Weight, Position, Rookie Status & More
  12. Merrill Kelly - 2010 Baseball Roster - Sun Devil Athletics | ASU
  13. Desert Mountain High School Awards & Honors - HomeTeamsONLINE
  14. Diamondbacks pitcher Merrill Kelly's Valley roots inspire young ...
  15. Merrill Kelly - BR Bullpen - Baseball-Reference.com
  16. 2010 Hudson Valley Renegades - Statistics and Roster
  17. Merrill Kelly Player Card | Baseball Prospectus
  18. Merrill Kelly Career Stats - Baseball America
  19. SK Wyverns sign American right-hander Merrill Kelly
  20. Kelly brings global experience into crucial G6 start - MLB.com
  21. Merrill Kelly went from not knowing the KBO existed to having it save ...
  22. Baseball club acquires ex-big league pitcher - Yonhap News Agency
  23. What Do KBO Baseball Players Make 2017
  24. Scouting report: What the Diamondbacks can expect from Merrill ...
  25. Merrill Kelly - Stats - Pitching | FanGraphs Baseball
  26. SK Wyverns win fourth Korean Series title - Korea JoongAng Daily
  27. Former KBO pitcher signs with Diamondbacks: report
  28. After stint in South Korea, Merrill Kelly signs with Diamondbacks
  29. 'He couldn't come back': The confusing tax fiasco that led Merrill ...
  30. Merrill Kelly Trades and Transactions - Baseball Almanac
  31. Merrill Kelly makes MLB debut with D-backs
  32. Rangers acquire Merrill Kelly from D-backs for 3 pitching prospects
  33. Rangers acquire Merrill Kelly in trade with Diamondbacks - ESPN
  34. Kelly's gem maintains rotation's brilliance in sweep of Guards
  35. Who is Merrill Kelly's Wife? - Sportskeeda
  36. Merrill Kelly speaks on fatherhood - MLB.com
  37. Merrill Kelly - Sportskeeda
  38. Merrill Kelly finds peace in daughter through grind of season
  39. Whirlwind December brings D-backs pitcher Merrill Kelly back to ...
  40. Former Diamondbacks Pitcher Would Welcome Return to Arizona
  41. D-backs players line up for autographs from kids battling cancer
  42. Sunshine Stories - August 2025 - AZ Cancer Foundation for Children
  43. Hunger Awareness Day | Arizona Diamondbacks - MLB.com
  44. Arizona Diamondbacks' Post - LinkedIn
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