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.