The Braves sent left-hander Hunter Cervenka to Miami on Saturday in exchange for a pair of Minor League prospects -- infielder Anfernee Seymour and left-hander Michael Mader.
Cervenka made 50 relief appearances for Atlanta this season, his first in the Majors. The 26-year-old had a 3.18 ERA and 35 strikeouts in 34 innings, after not allowing a run in his first 15 outings. Eric O'Flaherty and Ian Krol remain as the two left-handed arms out of the Braves' bullpen.
"Good for him," Braves interim manager Brian Snitker said of Cervenka. "I mean from where he was a year ago to now, that's great."
Cervenka was drafted in the 27th round in 2008 by the Red Sox before he was sent to the Cubs in the Marlon Byrd trade in '12. Chicago released him in May 2015, and the Braves signed him as a free agent in July of that year.
Cervenka hasn't given up a run in his past three appearances, but he allowed four to cross the plate on July 30 against the Phillies on 21 pitches in one-third of an inning.
"[Cervenka] had the one bump the other night, but other than that, since I've been here, he's been really good," Snitker said. "Somebody you could depend on and someone who you could do that little matchup thing for an inning in a game."
Seymour, a 21-year-old speedster who was a seventh-round Draft pick in 2014, had been ranked the Marlins' No. 8 prospect by MLBPipeline.com. He played 103 games at Class A Greensboro this season, batting .252 with 36 stolen bases. 
Mader, 22 years old and drafted in the third round in '14, was Miami's No. 24 prospect. Mader pitched in 22 games for Class A Advanced Jupiter, starting 21, and went 7-6 with a 3.50 ERA and 81 strikeouts in 103 innings.