The Steelers' running game has struggled early in the season, with RB Rashard Mendenhall gaining just 3.0 yards per carry in September. A Pittsburgh rushing attack that primarily tested the middle of defenses in the first month of the season could get little going by running up the gut. When the Steelers have run outside, they have preferred to run to the right, according to NFL data, and they have had some success both off right tackle (where Willie Colon began the season and rookie Marcus Gilbert now starts after Colon's season-ending injury) and right guard, where Doug Legursky starts. Injuries are a concern with the line, with Legursky (shoulder) and OLT Jonathan Scott (ankle) slated to miss Week Four at Houston. One running-game positive: Backup Isaac Redman has fared well in limited carries, racking up 16-67-1 (4.2 ypc) entering Week Four.