LAS VEGAS (AP) — Nick Diaz moved back into title contention with a convincing unanimous decision victory over BJ Penn in the main event at UFC 137 Saturday night.

After an evenly matched first round, Diaz landed a number of strikes to the body and face in the second. He taunted Penn and continued to land heavy strikes, dazing the former champion.

It was more of the same in the third round with Diaz picking apart Penn at will, landing numerous combinations that left Penn’s face swollen and bloodied. All three judges scored the fight in Diaz’s favor 29-28, 29-27 and 29-28.

In the co-main event, Cheick Kongo defeated Matt Mitrione by unanimous decision 30-27, 30-28, 29-28. Kongo opened up the second striking, landing multiple solid kicks to the legs and body. Kongo got Mitrione down twice in the third round.