He was ruled out after the Steelers practiced Friday in preparation for the game. He had practiced all week.
It was previously reported that Steelers QB Ben Roethlisberger will miss this game, as will strong safety Troy Polamalu and right tackle Marcus Gilbert. Polamalu has been out since early in the first quarter of the Steelers' Week 5 game against Philadelphia and Gilbert was injured during the Steelers' Week 6 game against Tennessee.
Linebacker Stevenson Sylvester is questionable with a hamstring injury that's kept him out of the last two games. No other Steelers are expected to miss Sunday's game.
Mendenhall has never rushed for 100 yards against the Ravens, and the Ravens have never been ranked No. 26 overall against the run over the last decade entering a game against the Steelers.