Leon Spinks win the heavyweight title, he had a clear loss by a TKO in the third round at Joe Louis Arena in Detroit, Michigan on June 12. It was Spinks' last heavyweight bout for years, as he began boxing in the cruiserweight division. He beat contender Ivy Brown by a decision in ten rounds, and gained a decision against former and future title challenger Jesse Burnett in twelve rounds. When his brother Michael Spinks defeated Larry Holmes in a controversial upset for the IBF heavyweight championship in 1985, they became the only brothers to have held world heavyweight championships. They kept
Mike Tyson vs. Michael Spinks if it ended in a knockout, but favoured Spinks if it went the distance. 1940s middleweight champion Rocky Graziano predicted Spinks would "psych out Tyson, then knock the hell out of him." Archie Moore gave Spinks "a wonderful chance" of winning. Floyd Patterson, who like Tyson had been trained by Cus D'Amato, said "I originally picked him [Tyson], and I still do, but now I give Spinks a chance." Spinks entered the ring as a 4–1 underdog. Minutes before the fighters were due to enter the ring, there was a commotion in Tyson's dressing room when Butch Lewis noticed a