Heavyweight unification series Heavyweight unification series The heavyweight unification series, also known as the Heavyweight World Series, was a sequence of professional boxing matches held in 1986 and 1987 to crown an undisputed champion of the heavyweight class. The series was produced by HBO Sports and promoted by Don King. It ended with Mike Tyson as undisputed champion, holding the championship belts of the International Boxing Federation, World Boxing Association, and World Boxing Council. Prior to the series, the last undisputed heavyweight champion had been Leon Spinks, who won the championship in his 1978 victory over Muhammad Ali. Spinks had been stripped of
2012 in Super Fight League He has since been replaced with Ryan Healy. The main event saw Todd Duffee facing Neil Grove. Duffee's last fight was almost a year and a half prior when he lost a match to Alistair Overeem for the vacant Dream Heavyweight Championship. Grove's most recent bouts were with Bellator Fighting Championships where he won three fights and lost three fights. This was the first time the two fighters faced each other. The fight ended 34 seconds into the first round when Duffee earned a technical knockout victory over Neil Grove. Results Super Fight League 3 took place on May 6,