Watch UFC 100: Lesnar vs Mir 2 Online

It’s the biggest event in mixed martial arts history, and for UFC 100, the Ultimate Fighting Championship is bringing out the big guns. Two championships will be on the line when UFC heavyweight title holder Brock Lesnar defends his crown against rival Frank Mir in their long-awaited grudge match, and UFC welterweight champion Georges Rush St-Pierre puts his belt up for grabs against Brazilian knockout artist Thiago Pitbull Alves. Also, The Ultimate Fighter coaches collide as Dan Henderson takes on Michael The Count Bisping in a pivotal middleweight showdown. Date Time: Jul-11-2009 7pm PT/10pm ET