Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 02/2020 |  | Gianni Auletta | FW |  | TSV Schott Mainz U19 | U19 |
| 01/2020 |  | Issaka Mouhaman | MF | |||
| 01/2020 |  | Tim Müller | MF | |||
| 10/2019 | | Kabuya Mbuaya | MF | |||
| 07/2019 | | Tim Hansen | GK |  | Western Illinois Leathernecks | Western Illinois Leathernecks |
| 07/2019 | | Lars Hermann | DF | |||
| 07/2019 | | Felipe Bergmann | MF | |||
| 07/2019 | | Lukas Fischer | MF |  | Karlsruher SC U19 | Karlsruhe U19 |
| 07/2019 | | Michael Kohns | MF |  | FC Emmelshausen-Karbach | Emmel.-Karbach |
| 07/2019 | | Yoel Yilma | MF |  | Rot-Weiß Koblenz | RW Koblenz |
| 07/2019 |  | Ali Bülbül | FW | |||
| 07/2019 |  | Dennis de Sousa Oelsner | FW |  | Hassia Bingen | Hassia Bingen |
| 07/2019 | | Marius Fuchs | FW |  | 1. FSV Mainz 05 U19 | Mainz 05 U19 |
| 07/2019 | | Christian Hahn | FW |  | RWO Alzey | RWO Alzey |
| 07/2019 | | Mario Koch | AT-C | |||
| 07/2019 | | Johannes Peter | RE-C |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2019 | | Manassé Eshele | MF |  | SV Gonsenheim | SV Gonsenheim |
| 07/2019 | | Mike Wroblewski | GK |  | Hessen Dreieich | Hessen Dreieich |
| 07/2019 | | Noah Juričinec | MF | | SV Gonsenheim | SV Gonsenheim |
| 07/2019 | | Nikola Mladenovic | MF | | Hessen Dreieich | Hessen Dreieich |
| 07/2019 | | Lukas Rodwald | MF |  | Providence Friars | Providence Friars |
| 07/2019 | | Edis Sinanović | FW |  | Eintracht Trier | Eintracht Trier |