TYSON, MIKE SIGNED BASEBALL (JSA AUTHENTICATED)

HISTORY: 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 from 1987 to 1990 and was the first heavyweight boxer to simultaneously hold the WBA, WBC, and IBF titles, as well as the only heavyweight to successively unify them. Claiming his first belt at 20 years, four months, and 22 days old, Tyson holds the record as the youngest boxer to win a heavyweight title. Tyson won his first 19 professional fights by knockout, 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. The following year, Tyson became the lineal champion 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