The Marlins optioned Nardi to Triple-A Jacksonville on Monday, Christina De Nicola of MLB.com reports.
Nardi will cede his spot in the Miami bullpen to Aneurys Zabala, whose contract was selected from Triple-A in advance of Monday's doubleheader with the Rangers. The demotion comes after Nardi yielded 11 runs (10 earned) on 12 hits and four walks in five innings over his most recent four relief appearances.