Estevez was returned to Triple-A Albuquerque following Sunday's doubleheader with the Nationals.
The Rockies brought Estevez in from the minor-league ranks to serve as their 26th man in the twin bill, but the right-handed bullpen arm ended up going unused. He'll continue serving as organizational relief depth now that he's back in Triple-A, where he's provided solid work this season, turning in a 1.78 ERA and 23 strikeouts in 25.1 innings.