The Diamondbacks recalled McGough from Triple-A Reno on Friday.
McGough owns a 7.33 ERA and 1.70 WHIP through 27 innings in the majors this season, though he's put up a 3.09 ERA across 11.2 frames since being optioned to Triple-A in late June. He'll now return to the big leagues to give the Diamondbacks a fresh bullpen arm, replacing Slade Cecconi.