Michael Gerard Tyson (born June 30, 1966) is an American former professional boxer who competed from 1985 to 2005. He reigned as the undisputed world heavyweight champion and holds the record as the youngest boxer to win a heavyweight title at 20 years, four months and 22 days old. Tyson won his first 19 professional fights by knockout or stoppage, 12 of them in the first round. He won the WBC title in 1986 after stopping Trevor Berbick in the second round, and added the WBA and IBF titles after defeating James Smith and Tony Tucker in 1987. This made Tyson the first heavyweight boxer to simultaneously hold the WBA, WBC and IBF titles, and the only heavyweight to successively unify them.\n', '

Tyson became the lineal champion in 1988 when he knocked out Michael Spinks in 91 seconds of the first round. He successfully defended his titles nine times, which included victories over Larry Holmes and Frank Bruno. In 1990, Tyson lost the titles to underdog Buster Douglas, who knocked him out in the tenth round. Attempting to regain the titles, Tyson defeated Donovan Ruddock twice in 1991, but pulled out of a fight with then-undisputed heavyweight champion Evander Holyfield (who had defeated Douglas later in 1990) due to a rib injury.\n', '

In 1992, Tyson was convicted of rape and sentenced to six years in prison, but was released on parole after serving three years. After his release in 1995, he engaged in a series of comeback fights. He won the WBC and WBA titles in 1996, after stopping Frank Bruno and Bruce Seldon. With his defeat of Bruno, Tyson joined Floyd Patterson, Muhammad Ali, Tim Witherspoon, Evander Holyfield, and George Foreman as the only men in boxing history to have regained a heavyweight championship after having lost it. After being stripped of the WBC title in the same year, Tyson lost the WBA title to Evander Holyfield by an eleventh round stoppage. Their 1997 rematch ended when Tyson was disqualified for biting Holyfield\'s ears.\n', '

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