Nickell they're protecting since he is a key guy they'll be depending on this season. Same with Quinn and Webster. Kupp is ready for the season, no need to risk him any further as he is a key offensive piece.
Tavon I still think is being dangled for trade. Still believe there's a good chance he'll be moved. He has yet to do a damn thing with this staff on the actual field and show what he can do or how he fits, so for me that has to be considered against the fact that his drawbacks (poor hands and route running) are not fits for this offense.
Barron it's hard to say. Never did like the projection for him to play inside in this defense. He is a freelancer and seems to suffer when he has to think at all or play within a disciplined approach. I don't think he's a fit in this defense so maybe they're exploring trades for him or trying to get him where he needs to be mentally, similar to Tavon. Both might be kept around this season being well paid but not necessarily good fits for this regime, but if so it might be because the Rams couldn't find a good trade partner.