Kevin McBride McBride's career-defining performance was a victory over Mike Tyson, former undisputed world heavyweight champion, via a 6th-round TKO on 11 June 2005 when Tyson quit the fight by informing the referee that he would not be able to continue to round Seven in the MCI Center in Washington, D.C. The aged Tyson explained in a post fight interview that his heart wasn't into the sport any more. Tyson announced his retirement after the bout, saying "I'm not going to disrespect the sport anymore by losing to this caliber of fighter". McBride has suffered six losses by knockout—including twice against fighters
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