Round 1
They immediately come together int he center striking, landing combinations of kicks and punches. Velasquez grabs a single leg and while Rothwell tries to defend he is tripped by Velasquez and is taken down. Rothwell is trying to get back up with his back against the cage but Velasquez keeps picking him up and slamming him down. They get back up, separate, and are striking. Both are punching to knock the other out. Velasquez grabs the single leg and takes Rothwell down, into side control. Velasquez obtains north-south position and goes back into side control. He's landing strikes to Rothwell's face. Rothwell scrambles back to the feet and both stand. Velasquez grabs a leg again and returns to side control, raining down huge strikes to Rothwell's head. Rothwell scrambles to half guard but Velasquez stands up and is continuously punching Rothwell in the face. Velasquez gains mouth with 90 seconds left in the round. Rothwell hip escapes and Velasquez stands up over him. Velasquez regains side control, then gains the mount and absolutely tees off on Rothwell. Rothwell kicks him off but Velasquez dives back onto him, gets the back, stands up, picks Rothwell up, drops him, and begins again punishing his face. Rothwell gets back to the feet and looks very tired to finish the round. 10-9, possibly 10-8 for Velasquez.
Round 2
Velasquez looks fresh to start the second round. Velasquez grabs a single leg, takes Rothwell down, and gets the back. Velasquez is landing huge hooking shots from the back right to Rothwell's face. They move to the cage and Velasquez is teeing off on Rothwell's face. Referee Steve Mazzagatti stops the fight and immediately Rothwell objects and the crowd boos, in the replay it's pretty clear Rothwell was in the process of standing up. The stoppage may have been early, but it appeared that it would have been an eventuality.
Cain Velasquez def. Ben Rothwell via TKO 0:58 of Round 2