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
Xtreme Fighting Championships which took place on September 13, 2008 at the St. Pete Times Forum, featured the MMA comeback of Gan McGee. McGee, who stands six-foot, 10-inches tall and is known as "The Giant," had last fought on American soil during a UFC Pay-Per-View, when he battled heavyweight champion Tim Sylvia for UFC's world title. The fight ended up being highly controversial; Sylvia defeated McGee, but tested positive for steroids in a post-fight drug test. Sylvia was suspended by the Nevada Boxing Commission for six-months and was stripped of his title, but McGee was never granted a rematch, nor was the loss