As Nate Diaz prepares to throw a punch, Benson Henderson backs out of the way during the first round of their lightweight bout during the UFC on FOX card at Key Arena in Seattle.

Benson Henderson (left) and Nate Diaz are twisted on the canvas during the first round. The bout went five rounds, but Henderson scored a unanimous decision.

Benson Henderson beams while his arm is raised in victory, while Nate Diaz buries his face in a towel.

Alexander Gustafsson (blue trunks) fights off the effort of Mauricio Rua to bring him down during their light heavyweight bout.

Alexander Gustafsson locks on to Mauricio Rua during their light heavyweight bout. Gustafsson's unanimous-decision win put him in line for a championship fight.

At 6-feet-5, Alexander Gustafsson establishes himself as a towering presence in the light heavyweight ranks with his impressive victory over Mauricio Rua.

BJ Penn defends a kick. One of many he would face in onslaughts from Rory MacDonald.

MacDonald continues to attack Penn's midsection.

MacDonald holds his hands in the air after triumphing over BJ Penn.

Matt Brown wails at Mike Swick.

Matt Brown finishes Mike Swick with punches at UFC on FOX.

Matt Brown walks away from Mike Swick victorious.

Yves Edwards grazes Jeremy Stephens with a left cross.

Edwards barely has broken a sweat as the first man in the UFC to KO Jeremy Stephens.

Raphael Assuncao delivers a kick to Mike Easton during their bantamweight bout.

Raphael Assuncao busts out a big, mouthguard-protected smile as he's declared the winner over Mike Easton in their bantamweight bout at the UFC on FOX event on Saturday at Key Arena in Seattle.

Ramsey Nijem kicks as Joe Proctor tries to cover up during their lightweight bout.

Ramsey Nijem scores a decision over Joe Proctor in their lightweight bout in Seattle. Nijem was the pick on the cards of all three judges.

Daron Cruickshank delivered lots of punishment to Henry Martinez, including this knee, during their lightweight bout. Cruickshank scored a knockout on a kick to the head in the second round.

Daron Cruickshank is presented as the winner after knocking out Henry Martinez during the second round of their lightweight bout.

Marcus LeVesseur lifts Abel Trujillo during their lightweight bout. LeVesseur had an advantage in the second round until Trujillo stepped up the attack for a TKO victory.

Abel Trujillo celebrates his TKO victory over Marcus LeVesseur in their lightweight bout. Trujillo nailed LeVesseur with a series of knees in the second round until the fight was stopped.

Dennis Siver begins the beatdown of Nam Phan with a kick.

Dennis Siver is declared the winner after a featherweight masterclass.

 John Albert (bottom) attempts to submit Scott Jorgensen (top) with an arm triangle choke.

Scott Jorgensen triumphs with a last second submission of John Albert.