Spotrac article says signs are pointing to a Derek Carr release

I think the key may be Kellen Moore's contract.

If he got a 5 year deal, with a two year window to clean up roster and rebuild, he may go and do his own thing.

If he is expected to win and be competitive from day one, then he should keep Carr at least for a year and build around him until he has certainty he has a better option at the position.