Mike Tyson vs Michael Spinks - June 27th, 1988. Two undefeated heavyweight champions. Tyson knocks out Spinks in just 91 seconds, to leave no doubts as to who the heavyweight king was. Tyson was now the WBC, WBA, IBF and lineal heavyweight champ.

Mike Tyson vs Michael Spinks - June 27th, 1988. Two undefeated heavyweight champions. Tyson knocks out Spinks in just 91 seconds, to leave no doubts as to who the heavyweight king was. Tyson was now the WBC, WBA, IBF and lineal heavyweight champ.