I agree. He got almost no work but I think I see some natural athleticism there. He looks like he doesn't weight more than 235 or so, which is probably a bit light. But I wouldn't want him getting too big. Maybe another 10 pounds. I'm not really concerned with how this guy blocks. If he can wall off a linebacker and is willing to dive at the legs of a defensive lineman and can navigate his way through the wash without getting knocked over then that's all I need.
If you look at the way they use Aaron Hernandez in New England, they literally never run to his side of the field. I charted two of them their games in depth last year and in all those snaps they only called a run to his side once, and that was when Gronkowski was to his left. Every other time there was two tight ends and a run was called, it was to the other side.