Finding anyone in the portal this late in the game will be damn near impossible. Barham and Cowan will likely compete for snaps at SAM in camp, and Shockley may be able to move over from JACK depending on his coverage abilities.
The portal tends to warm up once spring practices are over, so some new names are likely to pop up in there over the next month. Barham is obviously talented, but having not even seen him in spring practices (at least he's there for them) it can't be comforting to already have to pencil him in as SAM1. I thought Cowan was a Jack LB and would back up Nchami, but I guess in desperate times they can try to move him over. What else is there? Booker? What a mess.