Mets bullpen is getting destroyed these days. They have ten games left and can use any reinforcements they can get. If Stanton has cleared waivers, as I assume he has (or would), trade him to the Mets for a minor leaguer. Stanton wouldn't be eligible for post-season, but Mets probably won't care at this point.
Another possibility is Boston, which is suffering from the same bullpen woes.