The Phillies optioned Cleavinger to their alternate training site Sept. 9.
Cleavinger joined Philadelphia as its 29th man for their Sept. 8 doubleheader with the Red Sox. The 26-year-old wasn't needed out of the bullpen and will have to wait until 2021 to make his big-league debut if he doesn't receive another callup over the final two weeks of the regular season.