McGahee pulled his left hamstring Sunday at Kansas City and was limited in practice. He ran during warmups and declared himself ready to play.
Broncos kick returner Quan Cosby is among the players Denver deactivated.
The Jets are without running back LaDainian Tomlinson (sprained left knee). He was replaced in the backfield by rookie Bilal Powell, who had been inactive all season. Shonn Greene is the full-time starter, and Joe McKnight the main backup.