Parnell at RT was better than any of the interior guys, IMO. Also, he has a higher upside. Center is my biggest concern. There are options at OG in Free Agency, in the draft and maybe (Leary) on the current roster. The options at Center are much more limited. There are rarely, if ever any quality Centers in Free Agency. There are only 3 Centers in the draft that I think have a shot to start as Rookies compared to multiple OGs. There are 4 options at Center on the current roster, but all have issues. Costa is the only one that has ever proven to be a decent run blocker, but he can't seem to stay healthy. Cook is decent as a pass blocker but terrible as a run blocker. Bernadeau was not very good at OG. He did OK at Center, but would moving to OC really make him that much better? Kowalski might have some upside, but he was undersized as a rookie and couldn't get on the field in 2012 due to injury.