And there you already have two reasons why I think that he's a great mentor for Kampman.
Both just kept working and working. Just look at him in the beginning of that movie. He slips down, gets up and starts battling the RT again. Pretty much like you'd see Kampman do.
Second of all, he knows how to play the elephant position. He knows what it's like to get to the QB, yet, drop back from time to time, even while that isn't your greatest strength.
Oh, and the third reason, he's 'fun crazy'.