I don't like not knowing either. Dunbar should compete. Turbin is another downhill runner like McFadden but I see him competing assuming he can block and catch. I'd like to see a big back come in an compete. They will bring in a Dunbar clone IMO as well as an all purpose rookie and some camp bodies. Sometimes one of these guys surprises.
On offense this is a small worry for me.
I don't see anyone talking about backup center or swing tackle which to be is a much issue to me. We need a TE from somewhere assuming we're actually going to use him. I have an issue with using a player too much because they are HOF bound. Had it with Emmitt and now with Witten. They are remiss in not developing a TE. They should be looking for a fast, big, athletic TE who will give LBers and safeties fits. I think Escobar can be that guy but I could be wrong. Then we could sure use a big reasonably fast WR.