Georges St. Pierre out of UFC 137 with Knee Injury, Penn vs. Diaz Now Headlines

Welterweight champion Georges St. Pierre is out of next Saturday's main event in Las Vegas against Carlos Condit at UFC 137 with a knee injury.

UFC President Dana White today announced the news via twitter saying:

"I just land in NYC and what do I always say!? I have to deal with bad shit everyday!! GSP is out with an injury!!! #oneofthosedays"

The main event appears to be cursed as St. Pierre was originally slated to defend his championship against Nick Diaz. However, after Diaz opted to skip multiple press conferences White elected to replace him with Condit.

Now, in another turn of events St. Pierre has suffered an injury according to White and is off the event.

White announced that B.J. Penn and Nick Diaz have been promoted from co-main event and will now headline the event in a three round bout at Mandalay Bay Events Center live on pay-per-view.

As for Condit, he will wait for St. Pierre to recover and attempt to capture the welterweight championship at a later date.

For additional information on UFC 137 follow Joshua Carey on Twitter.