Harrison only started one game at ROLB before Porter left and excelled that game. When Porter was ejected for a pre game fight in 2004 against the Browns. He had a sack, six tackles ( 5 solo) a qb hurry and a pass defensed. He also started 3 games for an injured Haggans in 2005. In those games he also excelled. Against the chargers he had an interception ( 25 yard return) 6 tackles, 3 for a loss, and a hurry and a pass defensed. Against the Jags he had 7 tackles, 1 sack and two qb hurries. The following week against the Bengals he had 5 tackles, 2 for a loss, 2 qb hurries and a pass defensed. He had one start in 2006 and had 8 tackles in that game.
Cowher really missed the boat on Harrison.
And as far as I can recollect Woodley's never been tried at ROLB.
It's not just about stats. When Harrison got on the field he was noticable, or at least to me he always was. Even when he wasn't making the play he impacted and influenced the play, mopre often than not to the Steelers advantage.
With Jason, he's had his moments, particularly in place of Woodley, where you can see some NFL game. But in the couple games he was tried in place of Harrison he was overwhelmed, and then injured. Thus they took Timmons out of his position and plugged him in place of Harrison.
In fact right there should tell you how much more difficult it is to play ROLB in the Steelers defense. Everyone always thought that Timmons had skills that would translate to the outside. But when put in place of 92 at ROLB Lawrence really struggled. And Timmons is 5x the player Woridis is imo.