Mike Tyson vs. Michael Spinks fight in boxing history, grossing some $70 million, of which Tyson earned a record purse of around $20 million and Spinks $13.5 million. Tyson won the fight, knocking out Spinks in 91 seconds. Michael Spinks became a professional boxer shortly after he won the gold medal at middleweight in the 1976 Summer Olympics. Initially, Spinks was more concerned with assisting his brother Leon's rise to the heavyweight championship, but was later convinced to turn pro himself. In 1981 Spinks fought Eddie Mustafa Muhammad for the WBA light heavyweight championship and defeated him by decision to win his first world title.
Mike Tyson vs. Michael Spinks The next year Spinks won the lineal championship from Mustafa Wassaja and then took the WBC title from Dwight Braxton in 1983 to become the undisputed champion. In 1984, Spinks added the newly created IBF title. In September 1985, after having defended his titles a combined total of ten times, Spinks moved up to the heavyweight class to challenge reigning IBF, "Ring", and lineal champion Larry Holmes, who had been champion since 1978. Spinks defeated Holmes in a fifteen-round decision to become the first reigning light heavyweight champion to win the heavyweight championship. Spinks defeated Holmes again in a rematch