Rashard Mendenhall ruled out for Pittsburgh Steelers

The challenges never cease for the beleaguered Pittsburgh Steelers running game.

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Running backs Rashard Mendenhall and Isaac Redman didn't practice Friday and will not play Sunday against the Cincinnati Bengals.

Mendenhall's Achilles tightened up on him during Pittsburgh's 26-23 loss last week. The team had hoped the soreness would dissipate enough to allow Mendenhall to go in Week 7. A bad ankle has kept Redman out of practice all week.

The short-handed Steelers will lean heavily on Jonathan Dwyer, who will start and figures to get the most touches out of the backfield.

Follow Dan Hanzus on Twitter @danhanzus.