Return, I'd expect 3 top 10 prospects from the other team, 1 A rated, 1 B rated one C with high upside.
Ideally we'd get more but just playing realistic.
As far as who. Angels and Cardinals. Aybar is a poor man's Simmons on the last year of his deal, he could come back here with some cash in the deal, and we'd get back all their top pitching prospects. They lack anyone I'm really interested in. Aside from Trout of course, but ther'es no ****ing way in hell he's going anywhere. Cardinals are more interesting, they have guys we can take. Peralta was just really good for them, so they may not be willing to give up on him. But, if we could get Piscotty, Cooney and Weaver along with Peralta (who we'd hopefully be able to eat some money and send elsewhere) for Simmons we should do that. Piscotty (or Grichuk) are what we need, Corner OFs who can actually hit.