I'd expect that Elam will be active and the #3 CB. I think they'll probably bring up Ingram, who had a good camp and roll with four outside CBs depending on the Benford injury.
The list of possible additions include a couple of names that came out of college highly ranked. Greedy Williams would cost nothing to add to the PS provided he's healthy and wants to play, and Sidney Jones, who we'd have to have active. Were those guys just bad fits in a system, like Elam, or do they just not have the desire.