Cishek was 1-5 with a 6.98 ERA in 19 games this season, his fifth in the majors.
The Marlins had removed Cishek as the closer and said they would "mix and match" at the end of games until they could determine a more permanent option.
Cishek had led MLB with four blown saves after faltering in back-to-back games. He had just three saves after totaling 73 over the previous two seasons.
The Associated Press contributed to this report.