If Rea didn't have a good start last game, I would say him.
Now, that I look at the roster, I don't think there's a feasible candidate to go down to AAA. DFA of Bush would be the move, and I don't know if they're ready to pull the plug on him.
Devin, Hoby, and Elvis are definitely down. Payamps could probably go if you needed him to close a tight game. Probably looking at 6 of Freddy, 2 of Bryse Wilson, and then 1 of Payamps. And if Freddy isn't able to go 6, then we're probably trailing by a good amount, and it's Pannone/Bush time.