So far for 2011, Dwight Freeney has 2 Tackles, 1 Sack and 1 FF. Robert Mathis has 4 Tackles and 1 Sack.
Obviously these are still 2 of the better defensive lineman in the league, especially in the pass rushing dept. The Colts defense is obviously playing better than their offense but it's still not enough to have helped them to any wins this year.
They switch these 2 guys around on the line but typically they'll bookend either other and go after the offensive tackles. The Steelers had an epic test in week 1 and failed miserably against a good defensive line. In week 2 they played somewhat better, but in pass protection they still let entirely too much through. Now they face 2 top notch lineman who are sure to test their skills early and often.
Unless the Steelers go max protect all day long, Either Gilbert or Scott will be 1 on 1 with their man. I would say I probably have a big more confidence in Scott, just from an experience standpoint. Either way these 2 guys are going to have to step up big time.