Upon debuting as a heel, and bounty hunter for Skandor Akbar, Duggan soon became a member of the Rat Pack faction, alongside Ted DiBiase, Matt Borne, and Mr.

[15] After losing a Loser Leaves Town match to the One Man Gang, Duggan left the UWF for the World Wrestling Federation (WWF).

Duggan would defeat low-card wrestlers such as Haruka Eigen, Kengo Kimura, Ryūma Gō and Kantaro Hoshino, while losing to main eventers such as Inoki, Tatsumi Fujinami, Seiji Sakaguchi, Strong Kobayashi and Tiger Toguchi.

Duggan, a now more established wrestler, was receiving a lot of good results during the tour, clashing with main eventers such as Fujinami, Sakaguchi, Kimura and Choshu to draws, and dominating young lions such as Tatsutoshi Goto and Yang-Seung Hi.

Duggan would tour one last time overseas in September of the same year, wrestling on New Japan's Challenge Spirit tour, resuming his encounters against Inoki, Fujinami, Kimura and Sakaguchi, as well as facing Umanosuke Ueda and George Takano in tag-team matches, teaming once again with Madd Maxx, Jerry Gray and The Angel Of Death.

Although he did not win any major titles in the promotion, for seven years he was a consistent fan favorite with his patriotic working class everyman gimmick.

[1][17] By the late fall of 1987, Duggan received his first major push since his return, being placed in a feud opposite "King" Harley Race, who was using a "monarch" gimmick; sneering at wrestlers he thought were below him.

[1][3][6][20] At WrestleMania IV, he participated in a 14-man tournament for the vacant WWF World Heavyweight Championship, where he lost to Ted DiBiase in the first round after interference from André the Giant.

André also interfered in several of Duggan's matches against other wrestlers, including Hercules on the April 30 edition of Saturday Night's Main Event.

He got involved in a feud with Dino Bravo,[3] and the two were on opposing sides as Jake "The Snake" Roberts' team fought André the Giant's at the 1988 Survivor Series.

[25] His next feud was with Russian Boris Zhukov, whom he defeated in a flag match on the November 26 edition of Saturday Night's Main Event.

[18][3] On the May 27 edition of Saturday Night's Main Event, Duggan earned a shot at the Intercontinental Championship against "Ravishing" Rick Rude.

[34] He began teaming with his former rival, Nikolai Volkoff and started a feud with The Orient Express (Tanaka and Sato), whom they beat at SummerSlam.

[3] At Survivor Series, the duo joined the Texas Tornado and Tito Santana in an elimination match to defeat a team led by Col.

[37] On the February 8 edition of Saturday Night's Main Event, Duggan and Slaughter defeated the Beverly Brothers (Blake and Beau).

Slaughter, and Big Bossman against The Nasty Boys (Jerry Sags and Brian Knobs), The Mountie, and Repo Man.

[1][3] Duggan eventually returned to television and started a feud with then-Intercontinental Champion Shawn Michaels, challenging him for the title on the May 3 edition of Monday Night Raw.

He debuted in WCW at Fall Brawl, where he defeated Steve Austin in a squash match lasting thirty-five seconds to win the United States Heavyweight Championship.

[1][3][9][43][44] After becoming champion, he quickly started a feud with Austin, and eventually defeated him in a title rematch at Halloween Havoc by disqualification.

[53] Duggan then started a short feud with Diamond Dallas Page, to whom he lost in a Taped Fist match at Bash at the Beach.

[3] Duggan then started a feud with the anti-American stable the Revolution (Shane Douglas, Dean Malenko, Perry Saturn, and Asya).

[3][58] During this period, he found the World Television Championship in a trash can, which had been thrown away by the previous champion Scott Hall earlier and claimed it for himself.

[3][59] Duggan continued to unintentionally cost Team Canada many of their victories,[3] but he helped Storm to defeat The Cat in a match at Starrcade.

On the March 12, 2003 pay-per-view of NWA Total Nonstop Action (TNA), Duggan made a surprise appearance and defeated fellow WCW alum Mike Sanders.

[71] Edge and Orton feared Duggan would help out Shawn Michaels in a handicap match and wanted to set an example for anyone else backstage that wished to do the same.

[1][72] After months of wrestling on Heat, Duggan returned to Raw in July, teaming up with The Sandman and feuding with Carlito and William Regal.

Duggan would appear on Raw's 800th episode during Kung Fu Naki's in-ring dance segment, which also involved various other members of the WWE roster.

[81] On April 2, 2011, Duggan was inducted into the WWE Hall of Fame by fellow inductee "The Million Dollar Man" Ted DiBiase.

The scandal that erupted after two in-ring enemies were found drinking and doing drugs together led to the end of the angle, the Sheik's release, and Duggan's temporary departure from WWF.

His wife and the fire chief suggested he go to Glens Falls Hospital where he was once again diagnosed with perirectal abscess with a high white blood cell count that was heading towards sepsis Duggan said.