Dan HendersonOne of the greatest fighters to ever get in a cage and a ring, Dan Henderson was a two-time American Olympian in Greco-Roman wrestling who went on to become one of the fiercest knockout artists in mixed martial arts history. His first fight against Muricio "Shogun" Rua is in the UFC Hall of Fame, and his knockout of former UFC Champion Michael Bisping is one of the greatest in MMA history. Read More Read Less