Muncy was optioned back to Triple-A Nashville on Tuesday, Jane Lee of MLB.com reports.
In order to make room for Josh Reddick coming off the DL with a thumb injury, Muncy was sent back down to Nashville. Muncy went 9-for-35 with two doubles and two RBI during his brief stay with the A's and will likely get another with the club later on this summer. With Nashville this season, Muncy is batting .263/.366/.442 with seven home runs and 20 RBI.