The Steelers started practice preparations for the Baltimore Ravens on Wednesday. RB Carey Davis (calf), DE Brett Keisel (knee), RB Willie Parker (not injury related), S Troy Polamalu (calf), DE Aaron Smith (not injury related), T Marvel Smith (back), CB Deshea Townsend (not injury related) and WR Hines Ward (not injury related) all did not practice on Wednesday.
