The Marlins recalled Gusto from Triple-A Jacksonville on Monday.
He'll join the 26-man active roster as a replacement in the bullpen for right-hander Pete Fairbanks, who was placed on the paternity list. Gusto collected a 5.67 ERA over 17 starts and 10 relief appearances in 2025 between the Astros and Marlins. He went five innings in his lone start with Jacksonville this season and will give the Miami bullpen some length.