Squad
| No. | Player | Born | P |  |  |  |  |  |  |
|---|---|---|---|---|---|---|---|---|---|
| 46 | Ibai Aguirre |  2007 | M | - | - | - | - | - | - |
| 2 | Jon Aramburu | 2002 | D | 6 | - | 518 | - | - | - |
| 7 | Ander Barrenetxea | 2001 | F | 3 | - | 182 | 1 | - | - |
| 38 | Luken Beitia | 2004 | D | - | - | - | - | - | - |
| 16 | Duje Ćaleta-Car | 1996 | D | 4 | - | 414 | - | 2 | - |
| 42 | Gorka Carrera | 2005 | F | - | - | - | - | - | - |
| 26 | Dani Diaz | 2006 | F | - | 1 | 25 | - | - | - |
| 6 | Aritz Elustondo | 1994 | D | - | 2 | 39 | - | 1 | - |
| 17 | Sergio Gómez | 2000 | D | 5 | 1 | 529 | - | - | - |
| 4 | Jon Gorrotxategi | 2002 | M | 4 | 1 | 411 | - | 1 | - |
| 11 | Gonçalo Guedes | 1996 | F | 5 | 1 | 503 | 1 | 2 | - |
| 12 | Yangel Herrera | 1998 | M | - | 2 | 53 | - | 1 | - |
| 19 | Jon Karrikaburu | 2002 | F | - | 1 | 32 | - | - | - |
| 14 | Takefusa Kubo | 2001 | F | 2 | 1 | 247 | - | 1 | - |
| 28 | Pablo Marín | 2003 | M | 1 | 3 | 200 | 1 | 1 | - |
| 13 | Unai Marrero | 2001 | G | 4 | - | 448 | - | - | - |
| 31 | Jon Martín | 2006 | D | 5 | 1 | 554 | - | - | - |
| 23 | Brais Méndez | 1997 | F | 2 | - | 148 | - | - | - |
| 3 | Aihen Muñoz | 1997 | D | 2 | 2 | 206 | - | 2 | - |
| 20 | Álvaro Odriozola | 1995 | D | - | 3 | 99 | - | 1 | - |
| 9 | Orri Óskarsson | 2004 | F | - | 5 | 117 | 1 | - | - |
| 10 | Mikel Oyarzabal | 1997 | F | 5 | - | 489 | 3 | 2 | - |
| 1 | Álex Remiro | 1995 | G | 2 | - | 196 | - | - | - |
| 18 | Carlos Soler | 1997 | M | 6 | - | 562 | - | - | - |
| 24 | Luka Sučić | 2002 | M | 2 | 3 | 273 | 1 | - | - |
| 8 | Beñat Turrientes | 2002 | M | 4 | 1 | 366 | 3 | 1 | - |
| 22 | Wesley Gassova Ribeiro | 2005 | F | - | - | - | - | - | - |
| 21 | Arsen Zakharyan | 2003 | M | 1 | 1 | 132 | 1 | 1 | - |
| 5 | Igor Zubeldía | 1997 | M | 3 | 1 | 326 | 1 | - | - |