UFC 121 Main Card Results (10/23) - Brock Lesnar KO'd, More!

Brock Lesnar suffered his first knockout at UFC 121 tonight, as he was overwhelmed by challenger Cain Velasquez in losing the UFC heavyweight championship.

In other key bouts, Jake Shields squeaked out a victory in his UFC debut over Martin Kampmann while Tito Ortiz suffered yet another loss to Matt Hamill.

For full detailed results, check out FightLine.com by clicking here.