| Nr. | Name | Alter | |
|---|---|---|---|
| Torwart | |||
 | 37 | Aitor Fraga | 21 |
| 35 | Egoitz Arana | 22 |
| 1 | Remiro | 29 |
| 13 | Unai Marrero | 22 |
| Abwehr | |||
 | 21 | Nayef Aguerd | 28 |
| 3 | Aihen Muñoz | 27 |
| 2 | Álvaro Odriozola | 28 |
 | 26 | Jon Aramburu | 22 |
| 6 | Aritz Elustondo | 30 |
| 12 | Javi López | 22 |
| 31 | Jon Martín | 18 |
| 20 | Jon Pacheco | 23 |
| 17 | Sergio Gómez | 24 |
 | 18 | Hamari Traoré | 32 |
| 5 | Zubeldia | 27 |
| Mittelfeld | |||
| 22 | Beñat Turrientes | 22 |
| 23 | Brais Méndez | 27 |
| 25 | Jon Magunazelaia | 23 |
| 4 | Martín Zubimendi | 25 |
| 16 | Olasagasti | 24 |
| 28 | Pablo Marín | 21 |
 | 24 | Luka Sučić | 22 |
| 15 | Urko González | 23 |
 | 8 | Arsen Zakharyan | 21 |
| Sturm | |||
| 7 | Ander Barrenetxea | 22 |
 | 11 | Sheraldo Becker | 29 |
 | 14 | Takefusa Kubo | 23 |
| 10 | Mikel Oyarzabal | 27 |
 | 9 | Orri Óskarsson | 20 |
 | 19 | Umar Sadiq | 27 |
| Trainer | |||
| Imanol Alguacil | 53 | |
| Co-Trainer | |||
| Ansotegi | 42 | |
| Labaka | 44 | |
| Torwart-Trainer | |||
| Jon Alemán | 40 | |