UFC 100 was a mixed martial arts event held by the Ultimate Fighting Championship (UFC) on July 11, 2009 in Las Vegas, Nevada.
The event included two championship bouts (Heavyweight and Welterweight) and a fight between the two coaches of the most recent season of The Ultimate Fighter reality series on Spike TV. The main event featured a rematch between UFC Heavyweight Champion, Brock Lesnar, and UFC Interim-Heavyweight Champion, Frank Mir. This title unification bout occurred as a result of former UFC Heavyweight Champion, Randy Couture's year-long "resignation" from the company. During his absence, the UFC created an Interim-Heavyweight Championship that Antonio Rodrigo Nogueira had won by defeating Tim Sylvia. Nogueira and Mir were opposing coaches in The Ultimate Fighter: Team Nogueira vs Team Mir and would fight for the interim championship at UFC 92.
During the airing of the television program, Couture returned to the company and UFC President Dana White announced that he would...