It's the biggest night the heavyweight division has ever seen, as four of mixed martial arts' best take to the Octagon. In the UFC 146 main event, heavyweight champion Junior dos Santos defends his crown against Frank Mir who is looking to make history by becoming only the second man to win the title three times. But that's not all, as former champion Cain Velasquez hits the comeback trail in a pivotal matchup with Brazilian star Antonio "Bigfoot" Silva. UFC 146: Dos Santos vs. Mir - Saturday, May 26th, live on Viewers Choice.