Steelers injuries: Ryan Clark participates in practice

Seven Pittsburgh Steelers were forced to miss Wednesday's practice with injuries.

Quarterback Ben Roethlisberger has already been ruled out for Sunday against the Baltimore Ravens with his shoulder injury. Safety Troy Polamalu (calf) and tackle Marcus Gilbert (ankle) have both missed the last several games for the Steelers and are expected to be out again on Sunday. Wide receiver Antonio Brown (ankle) is also unlikely to play. Linebacker Chris Carter (abdomen), tackle Max Starks (ankle) and defensive end Brett Keisel (shoulder) all missed Wednesday's practice as well.

Cornerback Curtis Brown (quad), safety Ryan Clark (concussion) and cornerback Ike Taylor (illness) were all limited at practice. Clark suffered his second concussion in the last three weeks, but he appears on track to start against the Ravens.

Running back Rashard Mendenhall (Achilles) and linebacker Stevenson Sylvester (hamstring) were both full participants in practice. Mendenhall is likely to return to the lineup after missing the past four games.