Demolition Ax

In 1986, he returned to the World Wrestling Federation and became Super Machine with André the Giant as Giant Machine and Blackjack Mulligan as Big Machine. The three Machines were introduced as rivals of Bobby Heenan and his massive tag team, Big John Studd and King Kong Bundy. (The Machines' masks and gimmick were copied from New Japan Pro Wrestling character "Super Strong Machine," played by Japanese wrestler Junji Hirata.) Eadie later dropped the Machine gimmick and left the WWF to head to Florida for a run as the Masked Superstar, upending Lex Luger to win the NWA Southern title.
In January 1987, Eadie returned to the WWF and competed as Ax, half of the tag team Demolition with Smash. Though they began as heels, their unique brawling style and charisma made them so popular that they became faces in November 1988. They won the WWF Tag Team Championship three times as a team of two, but lost the belts at SummerSlam 1990 after they turned heel by forming a threesome with Crush. The trio concept was precipitated by a mutual decision to phase out the Ax character and for Eadie to take a backstage role in the company. Popular rumor at the time cited heart problems on Eadie's part, which have been discredited in recent years. An allergic reaction to shellfish while in Japan after Wrestlemania VI was the real cause of his heart stopping (Eadie confirmed this in a shoot interview in 2007). Before Eadie was medically cleared, Crush had been recruited, originally as a temporary replacement.
Eadie's new position eventually fell through and his final WWF appearance was at Survivor Series 1990. This event also marked the last time that he and Smash spoke for 17 years.
In the midst of this time period, Eadie also played opposite Hulk Hogan as "Jake Bullet" in the movie No Holds Barred.