Marc Colombo is the backup at both left and right tackle and played well when Williams went down against Atlanta.
"I thought Marc played a strong game for his first time on the field," said head coach Dick Jauron. "He didn't look like he lacked confidence. I thought he went in there we didn't seem like anyone was trying to compensate for him. John (Shoop) just made his calls and we played our game. I thought he acquitted himself well."
The problem lies beyond Colombo, if the rookie has to start at right tackle then who is the backup. Mike Gandy hasn't played a snap in the first two weeks after playing extensively in the preseason.
Rookie Terrence Metcalf is another possibility, but he's been inactive in the Bears two wins.
If the decision of whether to play or not is up to Williams there is little doubt what the result would be. He has a string of 120 consecutive games dating back to 1994.
The Bears were the only team in the NFL to have the same five offensive linemen start every game last season.