I think we will go with a 1B/DH rotation/platoon type situation with Casas, Hosmer, Dalbec, Cordero, Arroyo and Enmanuel Valdez in the mix to win opening day slots. (Maybe Pham, if the option is accepted.)
Arroyo will be on the 26, if healthy as the utility back-up player who might DH, at times. Nobody else on this list really has a slot 100% locked up.