UFC 55: Fury

Mark Kerr (born December 21, 1968) is an American former wrestler and mixed martial artist. During his MMA career, he was a two-time UFC Heavyweight Tournament Champion, World Vale Tudo Championship tournament winner, and a PRIDE FC competitor. In collegiate wrestling, Kerr was an NCAA Division I champion. In freestyle wrestling, he won gold and silver medals at the World Cup and silver at the Pan American Games. In submission wrestling, Kerr is a four-time ADCC World Champion, winning his weightclass twice along with the absolute division and the Superfight Championship. In 2002, Kerr was the subject of an HBO documentary titled The Smashing Machine, which detailed his MMA career fighting in Vale Tudo, the UFC and PRIDE. The Smashing Machine also focused on Kerr's struggle with substance abuse, his relationships with his then-girlfriend, various training partners, and friendship with Mark Coleman. A film of the same name by A24, starring Dwayne Johnson as Kerr, was released on October 3, 2025.