The Marlins claimed Roa (shoulder) off waivers from the Reds on Friday, Christina De Nicola of MLB.com reports.
Roa posted a 5.55 ERA and 47:30 K:BB over 48.2 innings with Triple-A Louisville in 2024 before going down in August with a right shoulder sprain. He did not have surgery, but it's unclear whether Roa will be ready for the start of spring training.