Breaking it down: There are a few other players who could also compete inside such as Anthony Alosi, but this position battle should really come down to two names: Mahon and Laurent.
Dieffenbach is the only returning starter on the interior, so he’ll reclaim his spot at left guard with ease. Mangiro, a strong sub the past two seasons, is also nearly a lock to start. But where he plays -- guard or center -- will be dependent upon Mahon and Laurent. If Laurent excels, then he’ll start at center, Mangiro will move to right guard, and Mahon will be a sub. But if Laurent falters, then Mangiro will likely move to center and Mahon will start at right guard.
Those are the two most likely scenarios right now. The chemistry of the line will be greatly increased if one of those two players can quickly separate himself. The incoming freshmen are all projected to be tackles since there are only two returning players on scholarship there, so this position battle could really be decided in the next two months.
Pre-camp edge: Laurent. He’s a redshirt sophomore who gained just six pounds, from 278 to 284, between the 2012 and 2013 seasons. He has experience, so he has the slight edge on Mahon right now -- but there’s no doubt that 305-pound Mahon has the higher ceiling. As a result, this is somewhat akin to the Brandon Felder-Geno Lewis dilemma at receiver last season. Mahon appears to be the long-term answer, but it’s not yet certain if he’s ready. If he’s not, Laurent will take over -- it's his job to lose.