Updated

Philadelphia, PA (SportsNetwork.com) - Detroit Lions running back Reggie Bush was not in the starting lineup Sunday against Philadelphia because of a calf injury he aggravated after slipping during warmups.

Snow began falling in Philadelphia during the middle of the morning and covered the field before kickoff.

Bush, who was limited in practice throughout the week with a calf injury, slipped on the icy field before the game and did not play in the first half against the Eagles.

Detroit deemed Bush questionable to return to the game.