Nevermind the years at the money right now:
Locks:
Cueto
Latos
Leake
Cingrani
Trade Bait?
Bailey
Wild Card:
Chapman
If you're going to try to trade Bailey and keep Chapman as a closer, you try to keep Arroyo. If you want to keep Bailey, I really don't see a need to try to re-sign Arroyo. If you want to trade Bailey and start Chapman, well that's where things get interesting.