Miami Dolphins Matt Moore is being evaluated for a possible concussion, leaving his status for this week uncertain.
Moore left Sunday's loss to Philadelphia midway through the second half. He was hit from behind while throwing an incomplete pass and was slow to get up before walking off the field.
Moore showed symptoms of a concussion on the sideline, coach Tony Sparano said Monday.
Sparano declined to update the status of Pro Bowl tackle Jake Long, who left the game in the first quarter with a back injury.
If Moore can't play Sunday at Buffalo, J.P. Losman would start against his former teammates. Losman came off the bench against the Eagles, threw his first NFL completion since 2008 and finished six for 10 for 60 yards with five sacks.