Roy Nelson (born June 20, 1976)[3] is an American mixed martial artist who competes in the Heavyweight division of Bellator MMA. A professional competitor since 2004, he formerly competed for the UFC, EliteXC, the IFL, BodogFIGHT, and was the winner of The Ultimate Fighter: Heavyweights. Nelson is also the former IFL Heavyweight Champion, competing under Ken Shamrock and the Lion’s Den. Nelson is widely regarded as possessing one of the greatest chins of all time.