Chicago Bears coach Lovie Smith told reporters on Monday that Jay Cutler is "feeling a lot better today" after sustaining a concussion in Sunday night's 13-6 loss to Houston, but Smith did not know whether Cutler would play in next Monday's game against the 49ers.
"If we err, it would be as far as keeping players out longer," Smith said.
Cutler must be cleared by an independent neurologist to be eligible to play next Monday night.
Jason Campbell would start if Cutler is unable to play. Campbell completed 11 of 19 passes for 94 in the second half against the Texans after Cutler did not return.
The Bears also are in the process of re-signing veteran quarterback Josh McCown.
Smith said he believes Cutler suffered the concussion after he was hit in the head by Texans linebacker Tim Dobbins after Cutler had released a pass late in the second quarter.
Cutler played seven more snaps after that. Smith noted that Cutler showed no signs of a concussion immediately after the hit by Dobbins. The NFL determined the Bears followed the proper protocol in terms of evaluating Cutler's concussion.