The Marlins recalled Gusto from Triple-A Jacksonville on Thursday.
Gusto has turned in a 5.55 ERA and 1.60 WHIP across 24.1 innings with the Marlins this season, but he'll return to Miami on Thursday to provide the big club with an additional long-relief option for its final stretch of games before the All-Star break. Zach Brzykcy was optioned to Jacksonville in a corresponding move.