This year when Buchner got hurt Angeli (true freshman) became the backup.
Next year if Buchner gets hurt then Angeli has to start (like Pyne this year) and then Minchey (a true freshman) becomes the backup.
Hopefully Buchner stays healthy and gives Hartman legit competition to start but you can't put all your eggs in the Buchner basket 2 years in a row given his injury history.