...in year 10 of a program and we are playing 3 frosh O linemen. that is a recipe for a difficult year. ....
Indeed, playing 3 or more true Freshman on the offensive line (Lowery, McCray, Pruehs, for sure, but perhaps Langenkamp and Pauley as well) is indeed a recipe for a difficult year, and I agree with you that it is surprising to be in this situation. Let's look at the line recruits that from the last few years.
2010 - M. Smith, Dietz
2011 - Welter, Lucas, Powell, Curtis, McQueen (plus Everhart, Williams)
2012 - Gibbons, Watson (plus Shilke)
2013 - Murdock, Wood (plus Adams, Alcorn, J.Willaims, Noltemeyer)
2014 - Lowery, Langenkamp, Pruehs, McCray, Dudziak (plus Pauley)
A couple players left due to injury (Smith, Dietz), and a couple for other reasons (Welter, Curtis). Wood is out for the season, and Gibbons and Everhart are out temporarily. That leaves Lucas, Powell, McQueen, Watson, and Murdock, and of these, all but Murdock played, but not all played for the entire game, for whatever reason.
How did Ohio end up here? It appears that it is a combination of some injuries, plus they probably should have recruited more offensive linemen in 2012 and/or 2013. They did add a lot of walkons in 2013, but those are young, too, and it hasn't helped much.