The Marlins began the 2020-21 offseason without any wiggle room on their 40-man roster. After several pitching staff tweaks—Adam Cimber, Paul Campbell and Zach Pop are in; Brandon Kintzler, José Ureña and Ryne Stanek are out—it is full again.
The thing is, the Fish are not done yet. General manager Kim Ng continues to seek experienced relievers and bats. There will certainly be some bargain shopping, attempting to discover an impact player on a minor league deal (e.g. Jon Berti). But sometime between now and spring training, expect them to make more 40-man additions.