Former UFC interim heavyweight champion Shane Carwin announced on his web site Saturday that he has suffered another back injury.

Carwin expects the injury to sideline him until next year.

“As I ramped up my training for UFC 141, my back locked up,” Carwin said. “It wasn’t like the [Brock] Lesnar fight, but my back just tightened up and I froze.

“I scheduled an MRI and the results showed that my disc in my lower back is into the nerves. My doctor gave me two options: retire and I could probably go on for a few years without surgery or I could undergo surgery and continue fighting. (MORE>>>)