First, more big mixed-martial arts matches are in store for "UFC 137: Penn vs. Diaz." Roy "Big Country" Nelson moved up the heavyweight rankings with a TKO over Mirko "Cro Cop" Filipovic, and Nick Diaz retired BJ Penn in a welterweight scrap to call out Georges St-Pierre for a title shot. Cheick Kongo, Brandon Vera, and Donald Cerrone also score impressive victories. Then, "UFC 138: Leben vs. Muñoz" features some quick finishes to further iron out the UFC's rankings. Bantamweight Brad Pickett takes out Renan Bar°o in the fight of the night, and welterweight Thiago Alves earns a submission win by choking out Papy Abedi in the first round. Mark Muñoz also gets a surprising TKO win against Chris "The Crippler" Leben in the middleweight main event. All fights are featured. Soundtrack: English.