Big Ben practices on limited basis

PITTSBURGH -- Steelers quarterback Ben Roethlisberger was limited in practice Friday, while safety Troy Polamalu and center Maurkice Pouncey sat out.

Roethlisberger has been nursing a sprained left ankle he injured last week against Cleveland. Coach Mike Tomlin and offensive coordinator Bruce Arians both said they'd like Roethlisberger to practice at least once before they decide whether he'll play Monday at San Francisco. He sat out three straight practices before participating Friday.

If Roethlisberger can't play, 37-year-old Charlie Batch will start. Roethlisberger, who has not missed a start due to injury in more than two years, was not available to the media.

Along with Polamalu (hamstring) and Pouncey (ankle), linebacker Chris Carter (hamstring) and receiver Emmanuel Sanders (foot) also did not practice. Polamalu is expected to play vs. the 49ers.