No. 5 -- Chael Sonnen
Photograph By Ed Mulholland for ESPN.com
Sonnen has said on many occasions that he'll fight any man on any given night. When he was slated to fight Mark Munoz at UFC on Fox 2, he didn't hesitate to take on Michael Bisping when Munoz went down with an injury just eight days before the fight. A fight's a fight, that's Sonnen's attitude. And who should agree to fight Jon Jones at UFC 151 on nine days' notice, even though it was for naught? It was none other than the "Gangster from West Linn."