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 between Tyson and Spinks grew to settle the issue of who the real champion was, but negotiations were protracted because Tyson's co-managers Bill Cayton and Jimmy Jacobs and Spinks' manager Butch Lewis struggled to agree on terms. Negotiations temporarily broke down when Lewis insisted on a $15 million guarantee for his fighter. Annoyed at constantly being asked about the fight, Tyson eventually demanded that his managers reach an agreement with Lewis. By April an agreement had been reached, although another problem arose when the IBF threatened to strip Tyson of their title if the fight was not scheduled for 15