| 2/4/19 |
Miami Marlins designated Isaac Galloway for assignment. |
| 2/4/19 |
Miami Marlins traded RHP Nick Wittgren to Cleveland Indians for RHP Jordan Milbrath. |
| 2/4/19 |
Miami Marlins claimed RHP Austin Brice off waivers from Baltimore Orioles. |
| 2/5/19 |
Miami Marlins signed free agent OF Curtis Granderson to a minor league contract and invited him to spring training. |
| 2/7/19 |
Miami Marlins traded C J.T. Realmuto to Philadelphia Phillies for C Jorge Alfaro, RHP Sixto Sanchez, LHP Will Stewart and Future Considerations. |
| 2/8/19 |
Miami Marlins sent RF Isaac Galloway outright to New Orleans Baby Cakes. |
| 2/13/19 |
Miami Marlins placed RHP Julian Fernandez on the 60-day disabled list. |
| 2/15/19 |
Miami Marlins signed free agent RHP Sergio Romo. |
