The Diamondbacks optioned Hughes to Triple-A Reno on Saturday.
Hughes owns a 2.00 ERA through 27 frames at Triple-A, but he allowed four earned runs in 3.1 innings after joining the Diamondbacks' bullpen Sunday. He'll now be sent back to Triple-A to make room for Zac Gallen (hamstring), who was reinstated from the IL in a corresponding move.