UFC president Dana White broke the news on his Twitter account, saying, “It’s GSP’s knee. We will sit Carlos to wait for GSP. It’s looking so far like he could be ready in a couple of months. Still early to tell tho.”. What the F! St. Pierre was scheduled to defend his welterweight championship against Carlos Condit at UFC 137 on October 29. Both St Pierre and Condit expressed their disappointment on Twitter. meanwhile BJ Penn vs Nick Diaz fight is elevated to the main event.