Morris was optioned to Triple-A Gwinnett on Thursday.
The right-hander was touched up for five runs in his only big-league appearance last year, which lasted two-thirds of an inning for the Mets. The 24-year-old put together a fine stretch with Double-Mississippi, though, boasting a 2.27 ERA in 25 appearances, with 50 strikeouts in 35.2 innings. If Morris can work on his control (21 walks in that time), perhaps a bullpen role with Atlanta awaits.