Bracho was optioned to Triple-A Reno on Wednesday.
Bracho pitched well since his most recent callup, allowing just one run in four innings of work while fanning three. However, being used four times in the past six days made him an easy candidate to head back to Reno when a roster spot needed to be cleared for Taijuan Walker to return from the DL. Despite the demotion, Bracho's string of strong performances should help him get back to the big leagues whenever Arizona needs fresh bullpen help.