The decision for the Mariners is a simple one: they need to choose to DFA one player to make room for him on the 40-man roster. If the player they choose to DFA isn’t on the 25-man roster, they’ll need to send somebody down to AAA as well.
There isn’t a shortage of options for Jerry Dipoto but a hard choice will need to be made nonetheless. For most of the last month, the assumed move was just to send Ryon Healy down to AAA. The team had an open spot on the 40-man roster and had no PAs to give.