The Steelers fear Rashard Mendenhall tore the ACL in his right knee during Sunday's 13-9 win over the Browns, according to a source. Mendenhall is scheduled to undergo an MRI later Sunday to confirm the diagnosis. Pittsburgh will face Denver in the Wild Card round of the playoffs next weekend. Mendenhall got hurt on a 5-yard carry on the final play of the first quarter against Cleveland. He walked slowly to the sideline.