Leon Spinks was an American professional boxer who made an indelible mark on the sport. He first gained international fame by winning the light heavyweight gold medal at the 1976 Summer Olympics. In only his eighth professional fight, Spinks achieved one of the greatest upsets in boxing history by defeating Muhammad Ali in 1978 to become the undisputed heavyweight champion. Though his reign was brief, his victory over Ali remains an iconic moment in sports history, cementing his legacy as a formidable and memorable fighter.