UFC 146: Dos Santos Vs. Mir

It's literally the biggest night of the year in the Ultimate Fighting Championship, as the first all-heavyweight main card in UFC history hits Las Vegas. In the main event, Junior Dos Santos defends his title for the first time against former two-time champ Frank Mir, but that's not all, as Cain Velasquez, "Bigfoot" Silva, Roy Nelson, Stipe Miocic and Stefan Struve prove that bigger is better in the Octagon.

Spanish commentary, Countdown to UFC 146, Weigh-in show, Behind the scenes.