Charles Tillman isn’t certain exactly when he hurt his triceps. (Jonathan Daniel / Getty Images)

If the Chicago Bears are to make a run at a division title, they’ll do it without, in the short run, Jay Cutler and, over a longer stretch, Charles Tillman.

Cutler, who has been dealing with a groin injury he suffered in a game against the Washington Redskins, has been ruled out of Sunday’s game because of an ankle injury, with Josh McCown named the starter by Coach Marc Trestman.

Tillman, who hurt his his triceps in Chicago’s 21-19 loss to the Detroit Lions, has been placed on the injured reserve list with designation to return. That means he can’t practice for six weeks and is ineligible to play for eight.

“It hurts; I’m definitely sad,” Tillman said (via the Chicago Tribune). “This team has a lot of potential. We have a lot of potential. And the fact that I’m no longer part of that to help this team to try and succeed, that’s the part that hurts. But my role right now is just to be the biggest cheerleader and supporter I can.”

It isn’t clear exactly when Tillman was injured.

“I knew something happened in the second half,” Tillman said. “I don’t know exactly what play. I just remember shoving Calvin [Johnson] on one play and felt something kind of strain or perhaps tear. I just felt a sharp pain.”

After spending most of her career in traditional print sports journalism, Cindy began blogging and tweeting, first as NFL/Redskins editor, and, since August 2010, at The Early Lead. She also is the social media editor for Sports.