The Marlins selected Bermudez's contract from Triple-A Jacksonville on Sunday.
The 29-year-old was claimed off waivers from the Giants late in 2022 and is now on the cusp of making his MLB debut. Bermudez pitched well in 14 starts for Double-A Pensacola this season with a 2.53 ERA over 74.2 innings, but he's struggled to a 6.46 ERA in 23.2 frames for Jacksonville.