UFC 137

A match between two of the best welterweights in the world doesn't get more exciting than this as Nick Diaz takes on BJ Penn.

Both Cheick Kongo and Matt Mitrione are coming off big knockout wins and guarantee a heavyweight battle.

This heavyweight matchup between TUF alum Roy Nelson and Mirko Cro Cop pits one of the game’s most devastating strikers against an iron-chinned warrior with a deadly ground game. Now they’ve got 15 minutes or less to prove who the better man is.

Expecting to spoil Jeff Curran’s return to the Octagon is Scott Jorgensen, a relentless contender with wins in six of his last seven bouts, including a first round knockout of Ken Stone in his UFC debut in June. “Young Guns” wants another shot at champion Dominick Cruz, and a win over Curran puts him on the right track.

Much has been made of Japanese star Hatsu Hioki’s arrival in the UFC, and for good reason. But he will be taking on TUF 8 alum George Roop, a fighter who is at his best when seen as the underdog, making this a precarious first step for a newcomer.

As the lightweight division’s human highlight reel, Donald Cerrone’s fighting style didn’t change one bit when he came over to the UFC from the WEC. Here he looks to continue that against Germany’s talented Dennis Siver.