| Nr. | Name | Alter | |
|---|---|---|---|
| Torwart | |||
 | 32 | Aitor Fraga | 22 |
 | 41 | Théo Folgado | 21 |
| 1 | Remiro | 30 |
| 13 | Unai Marrero | 24 |
| Abwehr | |||
| 3 | Aihen Muñoz | 28 |
| 20 | Álvaro Odriozola | 30 |
 | 2 | Jon Aramburu | 23 |
| 6 | Aritz Elustondo | 31 |
 | 16 | Duje Ćaleta-Car | 29 |
| 33 | Jon Balda | 23 |
| 31 | Jon Martín | 19 |
 | 45 | Kazunari Kita | 20 |
| 38 | Luken Beitia | 21 |
| 17 | Sergio Gómez | 25 |
| 5 | Zubeldia | 28 |
| Mittelfeld | |||
| 8 | Beñat Turrientes | 23 |
| 23 | Brais Méndez | 29 |
| 18 | Carlos Soler | 29 |
| 12 | Yangel Herrera | 28 |
| 46 | Ibai Aguirre | 19 |
| 4 | Jon Gorrotxategi | 23 |
| 44 | Lander | 19 |
| 36 | Alex Lebarbier | 21 |
| 28 | Pablo Marín | 22 |
| 24 | Luka Sučić | 23 |
| 43 | Tomy Carbonell | 20 |
 | 21 | Arsen Zakharyan | 22 |
| Sturm | |||
| Alberto Dadie | 23 | |
| 40 | Alex Marchal | 18 |
| 7 | Ander Barrenetxea | 24 |
| 34 | Arkaitz Mariezkurrena | 20 |
| 26 | Dani Díaz | 19 |
 | 11 | Gonçalo Guedes | 29 |
| 42 | Gorka Carrera | 20 |
| 19 | Jon Karrikaburu | 23 |
| 14 | Takefusa Kubo | 24 |
| 10 | Mikel Oyarzabal | 28 |
 | 47 | Ochieng | 23 |
 | 9 | Orri Óskarsson | 21 |
| Trainer | |||
 | Pellegrino Matarazzo | 48 | |
| Torwart-Trainer | |||
| Jon Alemán | 41 | |