ORCHARD PARK, N.Y. -- Bills running back LeSean McCoy injured his hamstring during Wednesday's practice and did not return.
The team is awaiting further evaluation before determining whether McCoy can play Sunday against the Dolphins.
"He was tight in the hamstring, so we'll see what happens with our medical evaluation and all that," Bills coach Rex Ryan said after practice. "I'm not going to look into [his availability Sunday] but we'll see how he comes back."
Quarterback Tyrod Taylor said he did not recall when McCoy's injury occurred but said he noticed the running back's reps seemed limited during practice.