This draft for the Steelers would be absolutely puke-worthy. Jeremy Cash is a reach in round 2, and he is the exact type of safety we don't need. Mitchell is best playing in the box, so we need a center fielder like TJ Green who was available. And you have to be kidding me with Cardale Jones in the 3rd. The Steelers desperately need at least 1 DL out of this draft, and you project a horrible QB prospect over Hassan Ridgeway.
Summary: I really don't think McClain is a 4-3 inside linebacker. The speed and lateral range just isn't there for me, and I think he would be exposed because he will overpursue gaps. McClain is great for 3-4 teams because he can play inside, but also move over to the outside if needed temporarily. His best fits are at 3-4 inside linebacker and 4-3 strongside linebacker. McClain is a solid prospect who will likely come off the board in the top 20 picks.
Player Comparison: Bart Scott. Scott has great instincts and size, and is a leader at inside linebacker in the 3-4 defense.