Thompson was optioned to Triple-A Rochester on Wednesday, Mark Zuckerman of MASNSports.com reports.
After appearing in two games since being called up Sunday, Thompson was sent back down to Triple-A in order to free up a spot for Jake McGee. Over the course of his brief stints in the majors this season, he's turned in an impressive 1.13 ERA and 1.00 WHIP over eight innings of work. It seems to be only a matter of time before the 24-year-old righty gets a long-term promotion to the big-league club.