Coach Matt Nagy said Tuesday that Mitchell Trubisky is day to day with a right shoulder injury. The second-year QB sat out of Tuesday's practice.
The issue puts Trubisky's status up in the air heading into Thursday.
"I'm staying cautiously optimistic, but I can't make any promises," Nagy said, via Rich Campbell of the Chicago Tribune. "I hope he does. He wants to play, I know that. We've got to make sure in these situations we're doing the right thing."
Nagy noted that the injury isn't a long-term issue for Trubisky and surgery isn't needed.
With only about 85 hours to recover between games, the injury to the QB is much more urgent for Chicago.
Trubisky has improved weekly under Nagy this season, using his arm and legs to move the ball in the coach's creative system.