center

I just don't think they have the resources to sign an OL to a big free agent deal. They are going to have to wait for a mid-priced veteran that's released (per the Rams comp pick formula they like) and go after him. Maybe that's a center, maybe LG.

I would slide Shelton over and pencil him in at center. It's his better position and I think he's better than Allen.

Then draft the best OL available (C, G or T) with their 2nd or 3rd round pick. Ideally 3rd so they could get an edge rusher in the 2nd.