When: 6/27/1988
Moment: This first-round KO of Spinks won Iron Mike The Ring magazine heavyweight title and also unified the IBF/WBA/WBC titles. Many critics have called this moment the peak of his career.
Complex says: Sadly, not too long after this fight, Tyson's career and life became a train wreck. Leeches (word to Robin Givens and Don King), a rape conviction, and biting ears off will do that to ya.