Matt Brown, right, punches Mike Swick in the second round during a welterweight mixed martial arts bout at a UFC on FOX event in Seattle, Saturday, Dec. 8, 2012. Brown won by knockout in the second round. (AP Photo/Jeff Chiu)

Rory MacDonald, right, kicks BJ Penn in the third round of a welterweight mixed martial arts bout at a UFC on FOX event in Seattle, Saturday, Dec. 8, 2012. MacDonald won by unanimous decision. (AP Photo/Jeff Chiu)

Rory MacDonald, right, elbows BJ Penn in the first round of a welterweight mixed martial arts bout at a UFC on Fox event in Seattle, Saturday, Dec. 8, 2012. MacDonald won by unanimous decision. (AP Photo/Jeff Chiu)

Matt Brown, right, punches Mike Swick in the second round during a welterweight mixed martial arts bout at a UFC on FOX event in Seattle, Saturday, Dec. 8, 2012. Brown won by knockout in the second round. (AP Photo/Jeff Chiu)

Matt Brown celebrates after beating Mike Swick during a welterweight mixed martial arts bout at a UFC on Fox event in Seattle, Saturday, Dec. 8, 2012. Brown won by knockout in the second round. (AP Photo/Jeff Chiu)

BJ Penn has his face wiped after the end of a welterweight mixed martial arts bout against Rory MacDonald at a UFC on Fox event in Seattle, Saturday, Dec. 8, 2012. MacDonald won by unanimous decision. (AP Photo/Jeff Chiu)

Rory MacDonald, right, has his arms raised by referee Herb Bean after beating BJ Penn, left, in a welterweight mixed martial arts bout at a UFC on FOX event in Seattle, Saturday, Dec. 8, 2012. MacDonald won by unanimous decision. (AP Photo/Jeff Chiu)

Alexander Gustafsson, from Sweden, left, knees Mauricio Rua, from Brazil, during the first round of a light heavyweight mixed martial arts bout at a UFC on Fox event in Seattle, Saturday, Dec. 8, 2012. Gustafsson won by unanimous decision.(AP Photo/Jeff Chiu)

Alexander Gustafsson, left, from Sweden, waves next to Mauricio Rua, from Brazil, after a light heavyweight mixed martial arts bout at a UFC on Fox event in Seattle, Saturday, Dec. 8, 2012. Gustafsson won by unanimous decision. (AP Photo/Jeff Chiu)

Ben Henderson celebrates after the end of the fifth round of a lightweight championship mixed martial arts bout against Nate Diaz at a UFC on Fox event in Seattle, Saturday, Dec. 8, 2012. Henderson won by unanimous decision to retain his championship. (AP Photo/Jeff Chiu)

Ben Henderson, right, has his arm raised by opponent Nate Diaz after the fifth round of a lightweight championship mixed martial arts bout at a UFC on Fox event in Seattle, Saturday, Dec. 8, 2012. Henderson won by unanimous decision to retain his championship. (AP Photo/Jeff Chiu)

Benson Henderson, left, kicks Nate Diaz during the fifth round of a lightweight championship mixed martial arts bout at a UFC on FOX event in Seattle, Saturday, Dec. 8, 2012. Henderson won by unanimous decision to retain his championship. (AP Photo/Jeff Chiu)

Ben Henderson, right, punches Nate Diaz during the third round of a lightweight championship mixed martial arts bout at a UFC on Fox event in Seattle, Saturday, Dec. 8, 2012. Henderson won by unanimous decision to retain his championship. (AP Photo/Jeff Chiu)

Benson Henderson smiles while speaking at a news conference after beating Nate Diaz in a lightweight championship mixed martial arts bout at a UFC on Fox event in Seattle, Saturday, Dec. 8, 2012. Henderson won by unanimous decision to retain his championship. (AP Photo/Jeff Chiu)

FILE - In this Dec. 8, 2012, file photo, competitors battle during a UFC on Fox mixed martial arts event at the Key Arena in Seattle. Fox says its new sports cable network will launch Aug. 17. The network said Tuesday, March 5, 2013, that Fox Sports 1, converted from Speed TV, will be in 90 million homes. The company has rights to college basketball and football, NASCAR, soccer and UFC for the channel. (AP Photo/Jeff Chiu, File)