Atlanta recalled Elder from Triple-A Gwinnett on Monday.
He'll join Atlanta's 26-man active roster as a replacement for right-hander Reynaldo Lopez (forearm), who was placed on the 10-day injured list in a corresponding move. According to Justin Toscano of The Atlanta Journal-Constitution, Elder will also take over Lopez's spot in the rotation, as he's scheduled to start Tuesday in the first game of Atlanta's home series versus Milwaukee. Elder has previously made nine starts for the big club this season, delivering a 5.67 ERA, 1.54 WHIP and 40:15 K:BB across 46 innings.