1. QB battle loser is almost surely gone, because they're way too talented to be a backup for the remainder of their career.
So that means they need 3 more scholarships:
3 key position battles:
OL - 2 openings - 2 pseudo returning starters in Bowen/Knox
Beyond that, 4 Jr/Sr OL have not broken through yet, most heading into year 5. There are absolute monsters in the 2017 & 2018 classes primed to jump up.
LB - 2 openings - 2 pseudo returning starters in Harrison/Booker
Beyond that, 3 Jr LBs are trying to change that, 2 of them heading into year 5. The 2017 & 2018 classes are also loaded, and early returns on Browning/Werner were strong.
Saf - 4 sophomores and 2 true frosh fighting for one opening opposite Fuller, and that's without factoring in Okudah or Tyreke as potential safeties.
Between that much competition among guys who have not broken through yet, and an entire offseason for any behavioral dismissals, being essentially 3 over isn't a very tall order.