Atlanta selected Burkhalter's contract from Triple-A Gwinnett on Tuesday.
Burkhalter has made a full-time move to the bullpen this season and excelled, collecting a 1.26 ERA and 46:11 K:BB over 35.2 innings, most of which that have come at Gwinnett. The 25-year-old will be making his major-league debut when he gets into a game.