Pittsburgh Steelers safety Ryan Clark passed all his concussion tests, including participating in practice on Wednesday, and expects to play against the New York Giants in Week 9. Clark left during the first half of the Steelers 27-12 win over the Washington Redskins with a concussion. He will have to pass a final test Friday or Saturday in order to be cleared to play, but he appears on track.

Pittsburgh's other starting safety, Troy Polamalu, is still out with a calf injury and did not practice on Wednesday. Tackle Marcus Gilbert (ankle), linebacker Stevenson Sylvester (hamstring), running back Jonathan Dwyer (quad) and linebacker LaMarr Woodley (hamstring) all did not participate in Wednesday's practice as well. Like Polamalu, Gilbert has already been ruled out for Sunday against the Giants. Dwyer expects to return to practice on Thursday.

Running backs Rashard Mendenhall (Achilles) and Baron Batch (shin) were both limited participants in Wednesday's practice. Mendenhall has missed the Steelers last two games with his Achilles injury. Running back Isaac Redman (ankle), who has also missed the last two games, fully participated in practice.