The Dodgers optioned Thomas to Triple-A Oklahoma City on Tuesday.
Thomas has been starting regularly in center field against right-handed pitching since getting called up by the Dodgers on Aug. 22, but he won't stay in the majors after going 4-for-19 with a double and three RBI in his first seven games for Los Angeles. Enrique Hernandez and Tommy Edman figure to split time in center field going forward for the Dodgers.