A title unification match between the Interim UFC Heavyweight Champion Frank Mir and UFC Heavyweight Champion Brock Lesnar was originally slated to be the main event, but was postponed until UFC 100 due to a knee injury to Mir.
By way of replacement, Quinton Jackson, former UFC Light Heavyweight champion, was to fight the undefeated current champion Rashad Evans but had to undergo arthroscopic surgery to repair ligament damage in his jaw that he received in a previous training camp. Instead, Evans headlined the card against fellow undefeated contender Lyoto Machida.
