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The Steelers may not have a running back with more than 300 yards this season (in comparison, Ray Rice has 657), but that doesn't mean Pittsburgh can't run the football. In fact, it's been the offense's go-to punch the last month.
Over that four-game stretch—all wins—the Steelers have averaged 140 yards on the ground. That kind of game-controlling dominance must continue if Pittsburgh is going to beat the Ravens.
Two factors that favors the Steelers accomplishing this: The Ravens are 26th in the NFL in stopping the run, giving up 132 yards per game, and Pittsburgh is expected to start Rashard Mendenhall, who has recovered from an Achilles' tendon injury, at running back.
Without Ben Roethlisberger, the Steelers have to win with their current strength beating the Ravens' obvious weakness. Mendenhal, Jonathan Dwyer and Isaac Redman have the ability to do that.