6. Dan Henderson
Dan Henderson only has 1 fight left in his long and successful career. Hendo announced that his UFC Middleweight Championship fight, which he was awarded somewhat controversially, against Michael Bisping will be his last fight.
Henderson has had numerous dramatic knockouts over the years, but none more so than at UFC 100 when he shut Michael Bisping’s lights off (and then gave him an extra shot just for good measure). Recently his come from behind victory over Hector Lombard was enough (evidently) to earn him a shot at the title.