Sean Keith Sherk (born August 5, 1973) is an American mixed martial arts fighter currently fighting for the UFC. He currently holds a professional mixed martial arts (MMA) record of thirty-six wins, four losses and one draw. Sherk has fought in both the UFC and Pride FC, and is a former UFC Lightweight Champion. He holds notable wins over Tyson Griffin, Hermes Franca, Karo Parisyan, Manvel Gamburyan, Kenny Florian, Nick Diaz and Evan Dunham. His only four MMA losses are to former UFC champions BJ Penn, Matt Hughes, and current UFC champions Georges St. Pierre and Frankie Edgar. He has never been submitted.