CHICAGO (AP) _ Tampa Bay fullback Mike Alstott left the game against the Chicago Bears on Sunday after spraining his left knee on a 3-yard carry in the second quarter. His status after a 13-10 loss was uncertain.

``Mike has some damage in his knee, but we won't know the extent of it until tomorrow,'' Bucs coach Tony Dungy said.

With 6:33 to go in the half, Alstott took a handoff and was brought down by a number of Bears in what resembled a rugby scrum. After the play, Alstott stayed on the ground writhing in pain for several minutes before he was helped off the field.

Alstott had rushed for 453 yards and scored five touchdowns entering Sunday. He had two carries Sunday for 3 yards and caught one pass for 5 yards before he was injured.

The Bucs also lost strong safety John Lynch, who dislocated his shoulder in the first quarter and did not return.

``I'm not sure how long that's going to be over the long haul. The shoulder came out and went back in,'' Dungy said.

``The injuries didn't really affect us. You hate to see guys go out and get hurt, but as far as what we were trying to do, it didn't have any effects on our plans.''