The injury will still keep the rookie out for the remainder of the year, but head coach Dick Jauron believed it could have been worse.
"I always fear the worst, and fortunately or unfortunately I've been the guy lying out there," Jauron said referring to a career-ending knee injury he suffered in 1980. "Having been there, you think of all the things that it could be. Then when you find out it was ‘only' the kneecap moving around, you're relieved, and Marc was the same, relieved to find out afterwards what it was.
"We're not really optimistic about this, that he'll play again this year. But the injury turned out to be not as severe as we had feared when we were on the field. But we'll know a lot more about it tomorrow. We haven't gotten the results back (on the MRI)."
In the meantime Bernard Robertson will step in as the starter at left tackle. Robertson did start at the position for the first five games of the year before being pulled in favor of Colombo.
Robertson was the team's backup at both tackle spots and Steve Edwards will now fill that role.
Jauron said Olin Kreutz, who missed Monday's game because of an appendectomy, should return to practice this week and could play Sunday against the Lions.
The Bears will go against the Lions minus another player. Todd McMillon had surgery on his hand Tuesday to repair ligaments and is out for the year. Apparently McMillon had been playing with the injury for some time and the Bears felt it was time to repair the problem.
"Todd chose to keep playing, wanted to stretch it out but he has to get it done in a window so that the long-term prognosis for him is real positive," Jauron said.
"Our doctors are saying that Jim will not throw this week and that being the case, he'll go as our 2 and Chris will go as our starter," Jauron said.
The last time Chandler started against the Lions (Oct. 20) he was sacked five times in a 23-20 overtime loss.