Michael Gerard "Mike" Tyson (born June 30, 1966) is a retired American boxer. Tyson is a former undisputed heavyweight champion of the world and holds the record as the youngest boxer to win the WBC, WBA and IBF world heavyweight titles, he was 20 years, 4 months and 22 days old. Tyson won his first 19 professional bouts by knockout, with twelve of them occurring in the first round. He won the WBC title in 1986 after defeating Trevor Berbick by a TKO in the second round. In 1987, Tyson added the WBA and IBF titles after defeating James Smith and Tony Tucker. He was the first heavyweight boxer to simultaneously hold and only Heavyweight to individually unify the WBA, WBC and IBF titles.
In 1988, Tyson became the lineal champion when he knocked out Michael Spinks in the first 91 seconds of the fight. Tyson successfully defended the world heavyweight championship nine times, including victories over Larry Holmes and Frank Bruno. Tyson lost his titles to 42-to-1 underdog James "Buster" Douglas on February 11, 1990, in Tokyo, Japan, by a knockout in round 10. Tyson continued in his quest to regain the titles, defeating Donovan Ruddock twice in 1991. Tyson was then scheduled to take on the undisputed heavyweight champion Evander Holyfield but pulled out due to injury.
In 1992, Tyson was convicted of raping Desiree Washington, for which he was sentenced to six years in prison but was released after serving three years. After being released from prison in 1995, he engaged in a series of comeback fights. In 1996, Tyson won the WBC and WBA titles after defeating Frank Bruno and Bruce Seldon by knockout. After being stripped of the WBC title, Tyson lost his WBA crown to Evander Holyfield in November, 1996 by an 11th round TKO. Their 1997 rematch ended when Tyson was disqualified for biting off part of Holyfield's ear.