| Name | Age | Position | Nationality |
|---|---|---|---|
| Álex Remiro | 30 | Goalkeeper | Spain |
| Unai Marrero | 24 | Goalkeeper | Spain |
| Aitor Fraga | 22 | Goalkeeper | Spain |
| Théo Folgado | 21 | Goalkeeper | France |
| Kazunari Kita | 20 | Defence | Japan |
| Luken Beitia | 21 | Defence | Spain |
| Jon Balda | 23 | Defence | Spain |
| Jon Gorrotxategi | 24 | Midfield | Spain |
| Alex Lebarbier | 21 | Midfield | France |
| Tomy Carbonell | 20 | Midfield | Spain |
| Lander | 19 | Midfield | Spain |
| Ibai Aguirre | 19 | Midfield | Spain |
| Orri Oskarsson | 21 | Offence | Iceland |
| Arkaitz Mariezkurrena | 20 | Offence | Spain |
| Mikel Goti | 23 | Offence | Spain |
| Alex Marchal | 18 | Offence | Spain |
| Dani Díaz | 19 | Offence | Spain |
| Ochieng | 23 | Offence | Kenya |
| Gorka Carrera | 20 | Offence | Spain |
| Pablo Marin | 22 | Attacking Midfield | Spain |
| Jon Karrikaburu | 23 | Centre-Forward | Spain |
| Arsen Zakharyan | 22 | Attacking Midfield | Russia |
| Beñat Turrientes | 24 | Central Midfield | Spain |
| Jon Aramburu | 23 | Right-Back | Venezuela |
| Ander Barrenetxea | 24 | Left Winger | Spain |
| Aihen Muñoz | 28 | Left-Back | Spain |
| Luka Sučić | 23 | Central Midfield | Croatia |
| Yangel Herrera | 28 | Central Midfield | Venezuela |
| Takefusa Kubo | 24 | Right Winger | Japan |
| Brais Méndez | 29 | Attacking Midfield | Spain |
| Carlos Soler | 29 | Central Midfield | Spain |
| Duje Ćaleta-Car | 29 | Centre-Back | Croatia |
| Gonçalo Guedes | 29 | Left Winger | Portugal |
| Sergio Gómez | 25 | Right Winger | Spain |
| Igor Zubeldía | 28 | Centre-Back | Spain |
| Aritz Elustondo | 31 | Centre-Back | Spain |
| Álvaro Odriozola | 30 | Right-Back | Spain |
| Jon Martín | 19 | Centre-Back | Spain |
| Mikel Oyarzabal | 28 | Centre-Forward | Spain |
| Alberto Dadie | 23 | Right Winger | Spain |