Mike Tyson won the undisputed world heavyweight title at age 20, becoming the youngest boxer ever to do so.

In 1986, Tyson captured the WBC heavyweight title by defeating Trevor Berbick, and by 1987 he had unified the WBC, WBA, and IBF titles, holding them simultaneously. His aggressive peekaboo boxing style, honed under Cus D'Amato, combined with ferocious power, made him a dominant force early in his career and set a record for youthful achievement in boxing.