They're all probably gonna need some work and the right system, but some that I could possibly see there are: Reid Fragel, Luke Marquardt, Nick Becton, Jordan Mills, Manase Foketi, Roger Gaines, Jamaal Johnson-Webb & Tanner Hawkinson
Xavier Nixon - not consistent, but had some really good games - was the only guy I saw keep Tank Carradine quiet (Tank hurt his knee late in that game). Probably a RT, but looks to have talent.
David Quessenberry has had a really good post season - showed up well at the Senior Bowl and his Combine numbers were excellent. On my overall scale, he had the 3rd best OT numbers behind Lane Johnson and Eric Fisher.
Reid Fragel not getting as much love as I thought he might because of his 33" arms. He had the 4th overall best workout in the OT group on my scale. Love his upside and aggressive nature.
Quessenberry reminds me a bit of Cordy Glenn last year. Goes to the Senior Bowl and because of physical characteristics everyone thinks he's a guard and they keep putting him there. Problem is he's one of those players who actually plays better on the edge. Quessenberry didn't suck as bad as Glenn did at guard, but nor is he as good a tackle prospect as Glenn was.
But as a 4th rounder, Quessenberry could be a big time steal.
I'm not sure if he can play LT but Luke Marquardt is an excellent mid round OT prospect. Tough to get around a man that big and he is more athletic than you would think. Just played for a small school so he isn't getting a lot of press but he is a hidden gem for rounds 4/5.