Bears quarterback Jay Cutler will undergo surgery on the thumb on his throwing hand after breaking it during Sunday's 31-20 victory over the Chargers. The team initially said the surgery would take place Tuesday but quickly changed that statement to say a date hasn't been set. "It's devastating," linebacker Brian Urlacher said. "It's horrible, and I felt worse for him than I did for us. It stinks for us because he's having such a great year. He's our leader. He's the guy we turn to for pretty much everything." Bears coach Lovie Smith wouldn't speculate on how long Cutler will be out. Sources said that he will likely miss the final six regular-season games.