Ranked 2nd in the league in penalties per game at 9.3 (Dallas 10.3).
Seriously though, I haven't seen this lack of discipline on a Steelers team in quite a while. And this is something that is completely on the coaching staff.
The bright side? ... the Steelers are only 17th in penalty yards per penalty (8.6 yds) meaning they aren't getting the killer PIs that result in huge gains.