PITTSBURGH — Steelers running back Willie Parker did not practice for a third consecutive day on Friday and is not expected to play against the San Diego Chargers Sunday night.

The Steelers listed Parker as doubtful, but players who do not practice hardly ever play for them. Parker might attempt to run during a special teams practice Saturday.

Parker injured his left big toe — an injury commonly known as turf toe — in Cincinnati on Sunday and did not practice all week.

Parker is expected to be replaced by Rashard Mendenhall, who was benched by coach Mike Tomlin in Cincinnati except for special teams because he didn't correctly run plays in practice. Mewelde Moore, normally the third-down back, is expected to get additional carries.