The Braves placed pitcher Tommy Hanson on the 15-day disabled list with a lower back strain on Tuesday.
The 25-year-old right-hander won on Monday, holding Miami to one run on six hits and three walks in five innings.
Hanson has struggled since the All-Star break. Despite winning both of his decisions, Hanson has posted a 7.45 earned run average with 16 walks in 19 1/3 innings over four starts.
The Braves recalled pitcher Cory Gearrin from Triple-A Gwinnett to take Hanson's spot on the roster.
Gearrin has appeared in two games for the Braves this season, allowing one run in 2 2/3 innings.
In 33 appearances for Gwinnett, Gearrin is 3-1 with a 1.27 ERA.