[12][13] While working for Larry Sharpe and Dennis Coralluzzo's WWA Promotion on November 28, 1992, in Clementon, New Jersey, his opponent "The Kamikaze Kid" Bill Wilcox overshot a suicide dive and landed on Waltman's head, driving it to the concrete and causing a blood clot near his brain.

He reminisced that he was lucky to have an opponent with a vested interest in an impressive match, rather than (as was then typical) a disinterested WWF veteran jobber like Virgil or Jim Powers.

[8] After earning a contract, he made his television debut as "The Kamikaze Kid" on Monday Night Raw on May 3 (taped April 26), losing to Doink the Clown.

Notably, Waltman was the only Kliq member not involved in the infamous "Curtain Call" that took place at Madison Square Garden the night before his final match from his first WWF run aired, as he was in drug rehab at the time.

[17] Later that night, he used a remote control to release New World Order (nWo) propaganda from the ceiling, revealing himself as the newest member of the recently formed faction.

[13] The next month, at SuperBrawl VII, Syxx pinned Dean Malenko for the WCW Cruiserweight Championship, after hitting him with the title belt, which he had grabbed from Guerrero at ringside.

[13] In mid-1997, the nWo invoked "Wolfpac Rules", allowing Syxx to replace the injured Kevin Nash in defending the WCW World Tag Team Championship with Scott Hall.

[2][13] With Shawn Michaels beginning a four-year retirement after a WWF World Heavyweight Championship loss and back injury, Triple H was now the leader of D-Generation X (DX).

"[2] Waltman appeared on the stage with a beard, commented on Bischoff and Hollywood Hogan, and said if they weren't contracted to WCW, Hall and Nash would have also returned to the WWF.

[21] Initially called "The Kid" on the WWF website, he became known as "X-Pac" (which originated from his nickname "Syxx-Pac" based on his ring name "Syxx" in WCW)[22] by the next Raw.

X-Pac feuded with Jeff Jarrett, ultimately defeating him in a hair-vs-hair match at SummerSlam, then with WWF European Champion D'Lo Brown, whom he dethroned on September 21, 1998.

He abruptly left TNA after defeating Lawler in the first round of an NWA World Heavyweight Championship number one contender tournament on November 6.

Under his real name, Waltman returned to TNA on February 13, 2005, at Against All Odds, attacking Jeff Jarrett during his NWA World Heavyweight Championship match with Kevin Nash.

At Hard Justice in 2005, Waltman replaced Jeff Hardy, who no-showed, and lost to Raven in a Clockwork Orange House of Fun match after being back body dropped through the steel cage.

This turned him heel[13] and led to a grudge match at No Surrender, which Styles won after guest referee Jerry Lynn prevented Waltman from cheating.

He later defeated Human Tornado and Scorpio Sky in singles matches, and teased an affair with Lizzy Valentine (the valet and girlfriend of Matt Sydal), though WSX folded before the angle could go on any further.

In June 2007, Waltman, as X-Pac, began working regularly for AAA, initially a member of Konnan's La Legión Extranjera (Foreign Legion) and managed by girlfriend Alicia Webb.

At Genesis on January 17, Syxx-Pac replaced Hall and teamed with Nash to lose to Beer Money, Inc. (Robert Roode and James Storm).

[37] On the March 29 Impact!, The Band lost a six-man steel cage tag match to Eric Young, Jeff Hardy and Rob Van Dam.

[44] On February 26, 2011, Waltman was inducted into the Legends Pro Wrestling Hall of Fame in Wheeling, West Virginia, by Jack Blaze at their "LPW X-Factor 2011" event.

On March 5, 2011, Waltman reunited with former D-Generation X members Road Dogg and Billy Gunn for a six-man tag match at a Pro Wrestling Syndicate show in Long Island, New York.

On July 23, he, Billy Gunn and Road Dogg returned to join Shawn Michaels and Triple H for a D-Generation X reunion on the 1000th episode of Raw.

[54] On March 23, 2013, in a four-way match at Jerry Lynn's retirement show in Minneapolis, X-Pac tore his anus by performing his signature Bronco Buster onto the exposed turnbuckle.

[66][65] The following night, Waltman teamed with Grado and Kenny Williams in a winning effort over Joe Hendry, Andy Wild and Stevie Xavier.

[67][68] On September 4, 2016, Waltman made a surprise return to Chikara, again representing DX alongside Billy Gunn in a tag team gauntlet match.

[70] In 2019, Waltman was inducted into the WWE Hall of Fame (under the X-Pac name) as a member of D-Generation X alongside Triple H, Shawn Michaels, Road Dogg, Billy Gunn and the late Chyna.

[71] During WrestleMania 35 weekend in April 2019, X-Pac, Hurricane Helms and Jushin Thunder Liger won a six-man tag team match against Revolt!

Waltman came out of retirement in February 2022, debuting in Game Changer Wrestling on its "Welcome to Heartbreak" pay-per-view in Los Angeles as the tag team partner of Joey Janela.

[79] He has been open about past substance abuse issues; during his relationship with Laurer, he struggled with an addiction to methamphetamine and narcotics such as cocaine and prescription pain medication.

He later said he was so overcome with shame and guilt after a physical altercation with his then-girlfriend Alicia Webb that he consumed a mixture of pills and alcohol and hanged himself from his apartment balcony.