The Royals optioned Loftin to Triple-A Omaha on Sunday.
The 25-year-old was called up by the Royals on Thursday but won't stick in the majors long following the additions of veterans Tommy Pham, Robbie Grossman and Yuli Gurriel. Loftin hasn't done much while up in the big leagues this season and has a .518 OPS in 57 games.