The Twins optioned Garlick to Triple-A St. Paul on Monday.
The demotion of Garlick clears a spot on the Twins' 26-man active roster for infielder Royce Lewis (knee), who was reinstated from the 60-day injured list ahead of Monday's game in Houston. Following his call-up from Triple-A on May 19, Garlick had largely served as a short-side platoon outfielder for the Twins, appearing in five games while going 3-for-10 with a home run, a double, two walks and three RBI.