On Wednesday, the Steelers started week 14 practice preparations for the Dallas Cowboys. DE Brett Keisel (knee) and T Marvel Smith (back) did not practice as expected and have already been ruled out for Sunday. DE Travis Kirschke (back), RB Willie Parker (knee, shoulder), S Troy Polamalu (calf), DE Aaron Smith (knee), CB Deshea Townsend (not injury related) and WR Hines Ward (not injury related) all sat out practice on Wednesday as well. CB Bryant McFadden (forearm) continued to practice fully on Wednesday and is looking to be back in the lineup this week. QB Ben Roethlisberger (knee) was limited on Wednesday in practice as well after he slipped and slightly injured his right knee while throwing a pass. Everyone except Keisel and Smith should be back to practice on Thursday in some capacity.