I think you can mix and match a few different players at OG, specially LG and maybe Amachia at Center.
Murphy has been playing 65% OT this spring, Amachia is listed as OG. Barclay is listed as G/T too so who knows now.
Pankey and Evans are rookies to watch also. And Gray.
I really like the talent level and mix of the Oline group. Another place with a battle well worth watching in a cpl weeks.