The blog where I read this indicated that Ohio St has self-reported 375 violations in the Tressel era despite having among the largest compliance staffs nationally, and that he is moving on after the sugar bowl. It does not state why he is moving on, nor does it indicate whether the violations are at the root of the problem.
Persinally, I would like to know if this is his last hurrah. If so, then I would feel a bit worse about my wager on Arky+