I would place Hosmer as very high on the DFA list.
Casas was impressive and stands a good chance at the very least to not be the weakest link in the lineup. And if he is even league averages with some growing pains, where does Hosmer fit in.
Hosmer himself has some trade value because San Diego can pay the overwhelming bulk of his salary. But his NTC could be an obstacle in moving him. We only know he won’t accept a deal to a rebuilding team, but he might have other preferences that make finding a trade partner difficult. If Casas has first, and Dalbec is still around, what is Hosmer’s role? Mediocre DH? Or third string 1b with no other positions? If it’s the latter, isn’t he just a waste of a 40 man roster spot?