Good thing we have six on the roster.
Well, five, since Krizancic isn't eligible this year due to his transfer. Even in the bizarre case that you got through all five, there are others than played QB in high school, such as Cope and Meyer.
Overall the situation isn't good, but I've seen much worse. One team I watched had the #3 QB transfer before the season since he didn't think he'd play. Then the starter had some non-football health issues that took him out for the season, the #2 QB broke some ribs, the #4 QB broke his thumb, and then when he was able to return to play from that, broke his collarbone on his first series. That left #5, a walkon who played adequately. They even made the student manager into the scout team QB, but he got tendinitis in his shoulder.
Even with all that they still had a successful season because of a great defense. Ohio's defense has the potential to be great, too, so I don't anticipate the QB problems from preventing a good season...they will just make it a little more challenging.