I've rarely heard a player called out more directly by OU media members (including ones who actually know the game) more than Tatum for his lack of knowledge of the playbook. It sounds like the guy rarely knew his own assignment. If Ott can't get on the field, it's hard to see Tatum getting much run after missing this much time, unless he has done a 180 in his prep work.
At some point (I would argue it should happen very soon), we need to whittle it down to only playing three guys. The other two should only play if we have injuries or are playing Kent State. IMHO, those three would ideally be Blaylock, X, and Ott. If Ott doesn't figure stuff out, then I guess I could live with Barnes getting a few snaps in specific situations. But trying to play five guys in conference? No thanks.