Legend BJ "the Prodigy" Penn fights fellow enfant terrible Nick Diaz in the main event of UFC 137, while Matt Mitrione tries to stay undefeated against the fearsome Cheick Kongo.
Legend BJ "the Prodigy" Penn fights fellow enfant terrible Nick Diaz in the main event of UFC 137, while Matt Mitrione tries to stay undefeated against the fearsome Cheick Kongo.