Peter Joseph Polaco (born October 16, 1973) is an American professional wrestler. He is best known for his appearances with Extreme Championship Wrestling (ECW) and the World Wrestling Federation (WWF) under the ring name Justin Credible.

Debuting in 1992, Polaco first came to prominence in 1994 when he debuted in the WWF as Aldo Montoya. After leaving the WWF in 1997, he joined ECW and adopted the ring name "Justin Credible". He formed the Impact Players tag team with Lance Storm in 1999 and the duo won the ECW World Tag Team Championship twice in 2000. Later that year, he won the ECW World Heavyweight Championship at CyberSlam and held it for five months. He remained in the title contention until ECW folded in 2001 and competed in the last match of ECW. He then returned to WWF as a member of X-Factor and later The Alliance during the Invasion angle. He later won the Hardcore Championship eight times before departing in 2003. He briefly returned to the renamed WWE in 2006 as part of the revived ECW brand.

Polaco traveled to Calgary, Alberta in 1992 to train at the Hart Brothers Training Camp, nominally run by Keith Hart. He was mainly trained by his future tag team partner, Lance Storm, and Chris Jericho, who both graduated the program the year before. After wrestling unpaid as P. J. Walker, and setting up the rings there for a time, he began working for New England–based wrestling promotions. ^{[citation needed]}

In 1994, he also worked a few matches as an enhancement talent in World Championship Wrestling (WCW).

He began wrestling for the World Wrestling Federation (WWF) as an enhancement talent. His first match was a loss to Lex Luger on the March 1, 1993, episode of Monday Night Raw. He continued to wrestle sporadically in the WWF throughout 1993 and 1994 losing to Yokozuna, Bam Bam Bigelow, Mr. Perfect, Diesel, Jeff Jarrett, Owen Hart, Undertaker and Nikolai Volkoff. He even scored an upset victory against Irwin R. Schyster on the September 20, 1993, episode of Raw, after a distraction by Razor Ramon.

In November 1994, Polaco was hired by Pat Patterson to a full-time contract in the WWF. His Portuguese ancestry inspired the WWF to give him the soccer player character of Aldo Montoya. However the idea changed to the "Portuguese Man O' War" character since he didn't like soccer. He made his televised debut as a fan favorite on the November 14 episode of Monday Night Raw, where he picked up a victory over The Brooklyn Brawler. He was once offered to be a part of the Million Dollar Corporation by Ted DiBiase. He refused and told him to "shove his money in his ear". His mask drew criticism by fellow wrestlers, who called it a "jockstrap". Polaco befriended The Kliq, an influential group of upper card wrestlers, after Razor Ramon offered to mentor him. Polaco made his pay-per-view debut at the 1995 Royal Rumble as a participant in the Royal Rumble match. He lasted 13 minutes until he was eliminated by eventual winner Shawn Michaels. Montoya suffered his first televised loss against Mantaur on the January 29 episode of Action Zone. On the April 8 episode of Superstars, Polaco defeated the Intercontinental Champion Jeff Jarrett in a non-title match, which earned him a title shot against Jarrett for the Intercontinental Championship on the April 22 episode of Superstars, where Jarrett retained the title. Montoya appeared at the In Your House pay-per-view, where he attempted to prevent Jarrett and The Roadie from attacking Razor Ramon after a handicap match.

He made only one pay-per-view appearance in 1996 at the Royal Rumble, where he participated in the Royal Rumble match, where he lasted only two minutes until he was eliminated by Tatanka. His only highlight of the year was an upset victory against Jerry Lawler on the July 27 episode of Superstars, which he gained by pinning Lawler with Jake Roberts' DDT finishing move. He lost to Lawler in a rematch on the August 5 episode of Monday Night Raw. After the match, Lawler poured Jim Beam whiskey down his throat.

Throughout this time, Montoya became more of a lower card wrestler and even asked for his release in June 1997 when he was only being booked twice a month. The WWF initially declined and sent him to a developmental promotion United States Wrestling Association in Memphis to hone his skills, where he remained for seven weeks. He was then released on the condition that he could not work for rival promotion World Championship Wrestling, which was then luring wrestlers away from the WWF with the promise of larger salaries. Polaco was instead sent to Extreme Championship Wrestling as part of a talent exchange between WWF and ECW.