| Player | Country | Position | born | |
|---|---|---|---|---|
| A | ||||
| Aitor Barbarin |
|
Spain | Defender | 19/06/1999 |
| Ander Arabaolaza |
|
Spain | Forward | 07/09/1993 |
| Ander Etxaniz |
|
Spain | Goalkeeper | |
| Ander Rementería |
|
Spain | Goalkeeper | |
| Asier Ugarte |
|
Spain | Forward | |
| I | ||||
| Iker Murúa |
|
Spain | Defender | 29/10/1990 |
| J | ||||
| Jon Aranda |
|
Spain | Defender | 10/04/1993 |
| Jon Izagirre |
|
Spain | Defender | 13/12/1996 |
| Jon Letamendia |
|
Spain | Midfielder | |
| Josu Zubizarreta |
|
Spain | Defender | |
| Julen Aramendi |
|
Spain | Midfielder | 29/11/1998 |
| Julen Odriozola |
|
Spain | Defender | 14/02/2000 |
| L | ||||
| Lur Bereziartua |
|
Spain | Midfielder | 01/01/1999 |
| M | ||||
| Markel Eskurtza |
|
Spain | Defender | 23/11/1991 |
| Mikel Aramendi |
|
Spain | Midfielder | 13/10/1994 |
| Mikel Arzalluz |
|
Spain | Forward | 10/01/1995 |
| Mikel Muguruza |
|
Spain | Midfielder | |
| Mikel Pastrian |
|
Spain | Midfielder | 16/06/1992 |
| Mikel Ruiz |
|
Spain | Goalkeeper | 19/02/1995 |
| R | ||||
| Ribera |
|
Spain | Defender | 01/01/1994 |
| S | ||||
| Soraluce |
|
Spain | Midfielder | 29/01/1996 |
| U | ||||
| Unai Arambarri |
|
Spain | Midfielder | 27/11/1993 |
| Unai Pérez |
|
Spain | Midfielder | 03/02/1998 |
| X | ||||
| Xabier Azcoitia |
|
Spain | Midfielder | |
