The Marlins have acquired lefty reliever Hunter Cervenka from the Braves, Fan Rag’s Tommy Stokke tweets. The Marlins have announced that they’ve sent minor league infielder Anfernee Seymour and lefty Michael Mader to Atlanta.

The 26-year-old Cervenka slowly made his way through the Red Sox and Cubs systems after Boston drafted him in the 27th round in 2008. He briefly wound up in independent ball after being released by the Cubs last season, then signed a minor league deal with the Braves in the middle of the 2015 season. He made his big-league debut this season and has gotten good results in the big leagues despite a very high 6.1 BB/9, with a 3.18 ERA and 9.3 K/9 in 34 innings. He has solid velocity for a lefty, with a fastball that averages around 93 MPH, and a good slider that has helped him hold opposing lefties to just .143/.264/.242.

Cervenka should give the Marlins’ bullpen a second lefty to complement Mike Dunn. Marlins relievers have been slightly below average against southpaws this season, allowing them to hit .250/.342/.383.

The 21-year-old Seymour was the Marlins’ seventh-round pick in 2014. He was hitting just .252/.293/.306 while playing shortstop for Class A Greensboro. MLB.com rated him the eighth-best prospect in a weak Marlins system, noting his excellent speed — he has 36 steals this year.

The Marlins picked Mader in the third round in 2014, and after struggling to strike batters out last year at Greensboro, the 22-year-old has taken a modest step forward this season at Class A+ Jupiter, with a 3.50 ERA, 7.1 K/9 and 3.0 BB/9 in 103 innings in the rotation. MLB.com ranked him the Marlins’ 24th-best prospect, reporting that he throws his fastball in the low 90s and also has a changeup and an inconsistent but potentially decent curveball.