Stats for each starting QB Kelly has coached at ND:
Crist
Rees
Golson
Kizer
Wimbush
Crist played so few snaps in 2011 before getting benched that we can't say much about his year-over-year improvement, but it wasn't headed in a good direction. Rees' TD/ INT ratio and YPA improved, but his completion % dropped, keeping his QBR pretty constant. Golson improved a bit between 2012 and 2014, but not dramatically. And while Kizer improved his TD/ INT ratio, he otherwise regressed in every other metric as a 2nd year starter.
Point being, I don't see any basis for expecting the sort of improvement many of you are apparently expecting from Wimbush this year. His legs might keep him at starter if the OL gels quickly and he has an explosive RB to help carry the load. But I fully expect to see a lot of Book at some point this season;
which will mean a much less explosive offense, and that our defense will have to shoulder a lot more of the burden.