I wonder how good the Steelers run-d really is. If you look at the offenses they've faced, very few actually run the ball well.
1- @New England - 28th rushing offense - Dion Lewis went 15-69. 4.6 ypc. The rest was Brady.
2 - San Francisco - 18th rushing offense - 49ers actually ran for over 100 yards but 50 of it was Kap
3 - @St Louis - 7th rushing offense but this was Gurley's 1st game and he only got 6 carries
4 - Baltimore - 22nd rushing offense
5 - @San Diego - 30th rushing offense
6 - Arizona - 10th rushing offense - stuffed them while Palmer threw for 421 yds
7 - @Kansas City - 9th rushing offense - West went 22-110-1, 5.0 ypc and 2-19 receiving
8 - Cincinnati - 12th rushing offense - stopped them but Hill still had 4.0 ypc
9 - Oakland - 23rd rushing offense - Murray went 17-96-0, 5.6 ypc
10 - Cleveland - 31st rushing offense
Throwing out the St Louis game, they have faced 3 rushing offenses in the top 12 and stopped 2 of them at home. The 3rd, on the road, roughed them up pretty good and controlled the game.
Seattle is the top rushing offense in the league and playing at home. Of course, Wilson's rushing stats skews their ranking but his running only helps Rawls.