He was mainly trained by his future tag team partner, Lance Storm, and Chris Jericho, who both graduated the program the year before.

[14] 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.

Polaco befriended The Kliq, an influential group of upper card wrestlers, after Razor Ramon offered to mentor him.

[18] 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.

[22] 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.

At As Good as It Gets, his character was repackaged as he shaved his head and switched to a grunge style of dress, and adopted a cocky, sneering, egomaniacal attitude.

[24][25] He began an undefeated streak which included a notable win over The Great Sasuke on the October 24 episode of Hardcore TV.

[35] Polaco and Victory lost to Dreamer and Jake Roberts in a tag team match at the company's premier pay-per-view event November to Remember.

[36] However, he defeated Dreamer in the first-ever Stairway to Hell match at the Guilty as Charged pay-per-view on January 10, 1999, thanks to interference by Terry Funk.

[39] Storm and Credible continued to feud with Dreamer until the duo formed a tag team at Crossing the Line called The Impact Players.

[42] Impact Players began dominating the roster in singles and tag team competition and quickly earned main event status by feuding with the company's top wrestlers.

[45] Impact Players' next feud was with The Sandman and the ECW World Tag Team Champions Tommy Dreamer and Raven.

[46] Impact Players continued their rivalry with Raven and Dreamer as they began pursuing the ECW World Tag Team Championship.

[7][47] A month later, Impact Players dropped the titles to Dreamer and Masato Tanaka on the March 3 episode of ECW on TNN.

Credible successfully defended the title against Corino and Jerry Lynn in an elimination match on the September 29 episode of ECW on TNN,[48] before losing the title to Lynn at Anarchy Rulz on October 1 after being hit with his own move That's Incredible,[48][53] ending his five-month reign at 162 days.

[8] Credible competed against Lynn, Corino and The Sandman for the title in a Double Jeopardy match, the following month at November to Remember.

The team split when Credible aligned himself with Paul Heyman's band of ECW insurgents and helped form The Alliance with World Championship Wrestling (WCW).

Credible was fired along with the rest of the Alliance roster (in kayfabe) by Vince McMahon until Ric Flair was able to save his job and get him drafted over to the Raw brand in March 2002.

On the Raw brand, Credible wrestled mostly on Sunday Night Heat and lost many singles matches he was in, but managed to become an eight-time WWE Hardcore Champion.

Polaco was released on January 20, 2003, with his final televised WWE appearance being a loss to Test on the December 8, 2002, episode of Heat.

He has appeared several times for Ring of Honor, where he was a member of The Carnage Crew, and for Xtreme Pro Wrestling, where he feuded with Shane Douglas.

[59] He appeared with Total Nonstop Action Wrestling (TNA), forming a stable with several other ex-ECW wrestlers and reviving his feud with Jerry Lynn.

On March 29, 2009, he became the Big Time Wrestling Champion, defeating "Hurricane" John Walters with Ric Flair as special guest referee, but Credible was stripped of the title in August of the same year.

[citation needed] Justin is also the topic of an upcoming documentary The Price of Fame which also includes Ted DiBiase and Sean Waltman.

On August 8, 2010, Polaco returned to TNA to take part in the ECW-themed pay-per-view Hardcore Justice where he performed as P.J.

[63] On January 14, 2012, Credible returned to the former ECW Arena, when he was defeated by Sabu at an Evolve event in the venue's final professional wrestling match.

[64] On April 28, 2012, Polaco was scheduled to wrestle on Shane Douglas' Extreme Reunion show, but was removed from the card, as well as the building after being found "slumped over, passed out asleep" in a chair.

[65] In their first round match on September 14, Team WWF was defeated by The Extreme Trio (Jerry Lynn, Tommy Dreamer and Too Cold Scorpio).

[66][67] Polaco retired on November 20, 2015, after facing long-time rival Tommy Dreamer at a Pro Wrestling Syndicate event.