Mike Tyson KOs Michael Spinks This Day June 27, 1988 and retains his heavyweight crown.brMike Tyson KOs Michael Spinks in 91 Seconds This Day June 27, 1988. “Iron Mike” Tyson retains the heavyweight crown in devastating performance.brOn June 27, 1988, Tyson faced Michael Spinks. Spinks, who had taken the heavyweight championship from Larry Holmes via a 15-round decision in 1985, had .br35th bout of Mike Tyson The WBC & WBA & IBF World Heavyweight Championship (Age 21 Fights 34 Won 34 Lost 0 Drawn 0 ) vs Michael Spinks from - Saint .