Roussimoff stood at over seven feet tall, which was a result of gigantism caused by excess growth hormone, and later resulted in acromegaly. It also led to his being called "The Eighth Wonder of the World". He found success as a fan favorite throughout the 1970s and early 1980s, appearing as an attraction for various professional wrestling promotions. During the 1980s wrestling boom he was paired with the villainous manager Bobby Heenan and feuded with Hulk Hogan in the World Wrestling Federation (WWF, now WWE). The two headlined WrestleMania III in 1987, and in 1988 he defeated Hogan to win the WWF World Heavyweight Championship, his sole world heavyweight championship, on the first episode of The Main Event. He also held the WWF Tag Team Championship before failing health forced him to retire in 1992.