Squad
| No. | Player | Born | P |  |  |  |  |  |  |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Alejandro Remiro |  1995 | G | 23 | - | 2136 | - | - | - |
| 1 | Aitor Fraga | 2003 | G | - | - | - | - | - | - |
| 13 | Unai Marrero | 2001 | G | - | - | - | - | - | - |
| 2 | Jon Aramburu | 2002 | D | 19 | 2 | 1768 | 1 | 7 | - |
| 3 | Aihen Muñoz | 1997 | D | 6 | 9 | 634 | - | 1 | - |
| 6 | Aritz Elustondo | 1994 | D | 4 | 4 | 351 | - | - | - |
| 16 | Duje Ćaleta-Car | 1996 | D | 13 | 2 | 1183 | - | 4 | 1 |
| 17 | Sergio Gómez | 2000 | D | 18 | 4 | 1647 | - | 1 | - |
| 20 | Álvaro Odriozola | 1995 | D | 2 | 2 | 215 | 1 | - | - |
| 31 | Jon Martín | 2006 | D | 14 | - | 1309 | - | 4 | - |
| 4 | Jon Gorrotxategi | 2002 | M | 18 | 3 | 1675 | 1 | 5 | - |
| 5 | Igor Zubeldía | 1997 | M | 17 | 1 | 1622 | - | 7 | - |
| 8 | Beñat Turrientes | 2002 | M | 7 | 7 | 617 | - | 3 | - |
| 12 | Yangel Herrera | 1998 | M | 2 | 1 | 98 | - | 1 | - |
| 18 | Carlos Soler | 1997 | M | 13 | 6 | 1222 | 2 | 2 | 1 |
| 21 | Arsen Zakharyan | 2003 | M | 1 | 11 | 309 | - | 1 | - |
| 24 | Luka Sučić | 2002 | M | 5 | 5 | 423 | 1 | 1 | - |
| 28 | Pablo Marín | 2003 | M | 9 | 11 | 922 | - | 1 | - |
| 7 | Ander Barrenetxea | 2001 | F | 13 | 6 | 1131 | 3 | 2 | - |
| 9 | Orri Óskarsson | 2004 | F | 1 | 6 | 150 | 2 | - | - |
| 10 | Mikel Oyarzabal | 1997 | F | 20 | - | 1793 | 9 | 2 | - |
| 11 | Gonçalo Guedes | 1996 | F | 17 | 6 | 1300 | 6 | 1 | - |
| 14 | Takefusa Kubo | 2001 | F | 13 | 5 | 1205 | 2 | - | - |
| 19 | Jon Karrikaburu | 2002 | F | - | 6 | 136 | - | - | - |
| 22 | Wesley Gassova Ribeiro | 2005 | F | - | 1 | 13 | - | - | - |
| 23 | Brais Méndez | 1997 | F | 15 | 6 | 1260 | 5 | 3 | 1 |
| 26 | Dani Diaz | 2006 | F | - | - | - | - | - | - |
| 47 | Job Ochieng | 2003 | F | - | 1 | 25 | - | - | - |