We're still awaiting official confirmation from the Diamondbacks on this one, and no word of what we might be getting back. This does tie in with rumors earlier in the day about the Mets closing in on a bullpen arm, but the news it was Reed does come as something out of the blue. Reed was in his second season with Arizona, having been acquired from the White Sox for Matt Davidson. He had his ups and down, but an ERA of 4.20 over exactly 100 games here isn't very good for a closer (it's an ERA+ of just 91). Reed was so bad that he was sent back to the minors for a month around the All-Star break; he has been better since his return.
This seems like the new regime getting rid of another questionable acquisition from the Kevin Towers era. Reed is earning $4.875 million this year, and probably would be due north of $5 million next year in his second year of arbitration - though the three (count 'em!) saves he picked up this season won't exactly translate into a big bump. He's under team control through the end of 2016. and might not suck. That probably does also resolve the issue of who gets moved to make way for tomorrow's spot starter (now looking increasingly like Allen Webster, who was pulled from his scheduled start for the Aces tonight).
Update. Rubin says, "The Mets will send two minor leaguers to the Diamondbacks. The trade is pending the exchange of medical information."