Assuming all healthy, Sandlin to the minors would be the most correct move. There isn't a true long man on that list, so theyd have to use a few guys for 2 IP at a time, depending on how efficient they were. Green, Burr, Fisher can all go 2 IP, Yariel can too though he's more high leverage now.
It would be an excellent problem to have Sandlin, Fluharty, Estrada, Pina, Schultz, Bhuihl, and Lucas in the minors as capable call-ups in case of injury.