Nate Marquardt's camp just released an official statement via the UFC on Versus 4 pre-fight telecast:

"Nate Marquardt was not medically cleared by the Pennsylvania Athletic Commission at UFC on Versus 4. Nate was looking forward to making his welterweight debut and is disappointed by this unfortunate turn of events. Nate wants to apologize to his family, friends, fans and the UFC. This outcome was certainly not what he wanted. At this time, Nate wants to be with those closest to him so he can evaluate his situation over the coming days."

UFC President Dana White was also on the telecast, sharing his thoughts on the matter. And he's not happy:

"I think it's pretty clear to the fans and everyone else that I'm disgusted with Nate Marquardt. He's been cut by the UFC and he won't fight for the UFC again. Bottom line: What Nate Marquardt did is bad enough to be cut by the UFC.... He has no business fighting in the UFC.... This is one of those situations where, because of the laws in Pennsylvania, Nate Marquardt is going to have to man up and tell the world why he didn't pass. And when he does, I think everyone will understand why he was cut from the UFC.... I give a lot of guys chances, and a lot of guys make mistakes. Nate Marquardt is one of those guys. So for me to come out and say that Nate Marquardt isn't going to fight in the UFC anymore, it's got to be pretty serious."

Lex McMahon, Marquardt's manager, revealed this evening that his fighter "will personally be addressing all issues this Tuesday."

More on this breaking news shortly.