Peterson was optioned to Triple-A Gwinnett on Monday.
Peterson was a pleasant surprise for the Braves during the second half of last season, but a rough .182 batting average to start the season was enough to send the 25-year-old back to the minors. There's a good chance that he could rejoin the major league club if he hits well in the minor leagues, though, as the Braves don't exactly have many set options in their lineup.