Starks may provide a minimal upgrade over Colombo. I don't even think he's worth bringing in and knowing Ireland and his M.O. I doubt he does bring him in.
Right now I'm sure our scouts are looking over game tape of every lineman in the league and evaluating which ones might be good to pick up in case they get cut. I think Berger, Carey and Jerry could be cut, Colombo should be cut, and we'll pick up 1, 2 or 3 lineman on the last day of cuts. Only O-lineman that are safe are Long, Pouncey and Incognito...the rest could easily be replaced if the dynamic duo feel they can get better from other teams trash.