UFC champ St-Pierre out of UFC 137 with injury, Diaz vs. Penn named new headliner

An injury has forced UFC welterweight champion Georges St-Pierre out of next weekend’s UFC 137 event and a title fight with Carlos Condit.

UFC president Dana White today tweeted the news.

A co-main event between B.J. Penn and Nick
Diaz has been promoted to the main event.
It’ll be contested at three rounds.