The Bills didn't update McGee's status following practice Wednesday, except to list him on their injury report with a knee injury.
McGee headed to the sideline during an individual drill. He was joined by a trainer and slowly walked down the sideline before being driven off in a cart.
McGee played as backup in the previous two games after missing five games while recovering from surgery to repair a nerve problem behind his knee.
Buffalo (2-8) is home Sunday against a Pittsburgh team that is 7-3 and tied for the AFC North lead.
Copyright 2010 by The Associated Press