| Name | Age | Position | Nationality |
|---|---|---|---|
| Matthias Köbbing | 29 | Goalkeeper | Germany |
| Ron-Robert Zieler | 37 | Goalkeeper | Germany |
| Marvin Schwäbe | 31 | Goalkeeper | Germany |
| Martin James | 18 | Goalkeeper | France |
| Timo Hübers | 30 | Defence | Germany |
| Alessio Castro-Montes | 29 | Defence | Belgium |
| Borna Sosa | 28 | Defence | Croatia |
| Gideon Mensah | 28 | Defence | Ghana |
| Luka Lochoshvili | 28 | Defence | Georgia |
| Joël Schmied | 28 | Defence | Switzerland |
| Sebastian Sebulonsen | 26 | Defence | Norway |
| Rav van den Berg | 22 | Defence | Netherlands |
| Elias Bakatukanda | 22 | Defence | Germany |
| Julian Pauli | 21 | Defence | Germany |
| Jahmai Simpson-Pusey | 20 | Defence | England |
| Ellyes Skhiri | 31 | Midfield | Tunisia |
| Tom Krauß | 25 | Midfield | Germany |
| Ísak Bergmann Jóhannesson | 23 | Midfield | Iceland |
| Paul Okon-Engstler | 21 | Midfield | Australia |
| Gil Neves | 18 | Midfield | Portugal |
| Linton Maina | 27 | Offence | Germany |
| Gian-Luca Waldschmidt | 30 | Offence | Germany |
| Ragnar Ache | 28 | Offence | Germany |
| Thijs Dallinga | 26 | Offence | Netherlands |
| Imad Rondić | 27 | Offence | Bosnia-Herzegovina |
| Marius Bülter | 33 | Offence | Germany |
| Jan Thielmann | 24 | Offence | Germany |
| Said El Mala | 20 | Offence | Germany |
| Malek El Mala | 21 | Offence | Germany |
| Mikey Moore | 19 | Offence | England |
| Reigan Heskey | 18 | Offence | England |