Reed was optioned to Triple-A Oklahoma City on Sunday, Jack Harris of the Los Angeles Times reports.
Reed was called up by Los Angeles on Wednesday and allowed one run over 2.2 innings during his brief time in the majors. It's the fifth demotion for the 29-year-old this year, so if he returns to the big leagues the Dodgers won't be able to send him back down without exposing him to waivers.