In addition, cornerback Sherrick McManis was held out for the second straight workout because of a quadriceps injury.
Bears coach Marc Trestman said Tillman is “day-to-day, and I’ll tell you exactly where he is tomorrow. (We’re) optimistic, but we’ll know a lot more in the morning.”
Despite missing two days of practice, Tillman seemed optimistic that he’ll play Sunday at Detroit. Asked on Wednesday whether there was any chance he’d miss, Tillman said, “No, I’ll be there.”
But as a contingency plan in case Tillman can’t play, the Bears worked veteran Zack Bowman in Tillman’s spot during Thursday’s session. Bowman (knee) participated in a limited capacity on Wednesday but was able to work fully on Thursday.
Tillman, 32, has already fought through a few issues over the first three weeks of the season. He played with the knee injury in the first two contests, and missed time during the Sept. 8 season opener because of dehydration. Against the Steelers, Tillman left the game in the second half to rest a sore groin.
“There’s not any concern about anything about Sunday. We’ll go into the game, we’ll see who is playing, and we’ll adjust accordingly,” Trestman said. “Charles is either gonna play because he’s ready to play, or he won’t play because he’s not. We’re not gonna put him out there if the doctors feel he’s not ready to play.”