UFC 121 presents: Lesnar vs. Velasquez - Saturday, October 23rd, live on Pay-Per-View at the Honda Center of Anaheim, California 7PM PT/10PM ET. The baddest man on the planet, UFC heavyweight champion Brock Lesnar, is back in the main event of UFC 121, and unbeaten Cain Velasquez is looking to take his belt and become the first man to knock him out. Also on this star-studded event, welterweight star Jake Shields makes his long-awaited UFC debut against perennial contender Martin "Hitman" Kampmann, and its teacher vs. student as Matt "The Hammer" Hamill takes on his coach from The Ultimate Fighter, former UFC light heavyweight champion Tito Ortiz.