McGough signed a minor-league contract with the Rockies on Thursday, Matt Eddy of Baseball America reports.
The right-hander spent the 2017 season between Double-A Bowie and Triple-A Norfolk in the Orioles organization, notching a 2.75 ERA over 55.2 innings. McGough will now head to Colorado to add some organizational depth, but he projects to at least start the year in the minors.