When Grasu comes back next year if Cody takes well to center they could move Grasu to RT he couldn't be worse than stone feet.
In all seriousness, he doesn't really have that kind of size, but your point is well taken and it sure as hell couldn't hurt to try. There have been smaller types that have succeeded at OT before. Size, while USUALLY critical, is not an "always" issue. There are always exceptions to the rule.
I posted the same thing on another thread. I agree he is not built like an NFL tackle but he is smart. quick and very strong. I bet he would be an upgrade over Massie in the long run.
This would assume that Grasu comes back in 2017 ready to go and we can't get an good RT in the draft. So our OL would be Leno-Sitton-Grasu-Long-Whitehair. Basically starting our 5 best OL guys.