| No. | Name | Birth Date | Age | Country | Position | Height | Weight | Preferred foot |
| 17 | Yuri Berchiche | 1990-02-10 | 34 | Defender | 181 | 79 | Left | |
| 18 | Oscar De Marcos | 1989-04-14 | 35 | Defender | 182 | 77 | Right | |
| 21 | Ander Herrera | 1989-08-14 | 35 | Midfielder | 182 | 71 | Right | |
| 16 | Inigo Ruiz De Galarreta | 1993-08-06 | 31 | Midfielder | 175 | 69 | Right | |
| 2 | Andoni Gorosabel | 1996-08-04 | 28 | Defender | 174 | 73 | Right | |
| 6 | Mikel Vesga | 1993-04-08 | 31 | Midfielder | 191 | 84 | Left | |
| 7 | Alex Berenguer | 1995-07-04 | 29 | Midfielder | 175 | 73 | Left | |
| 14 | Unai Nunez | 1997-01-30 | 27 | Defender | 186 | 80 | Right | |
| 12 | Gorka Guruzeta | 1996-09-12 | 28 | Forward | 188 | 78 | Right | |
| 9 | Inaki Williams | 1994-06-15 | 30 | Forward | 186 | 79 | Right | |
| 1 | Unai Simon | 1997-06-11 | 27 | Guard | 190 | 87 | Right | |
| 15 | Inigo Lekue | 1993-05-04 | 31 | Defender | 180 | 70 | Right | |
| 5 | Yeray Alvarez | 1995-01-24 | 29 | Defender | 182 | 78 | Right | |
| 3 | Dani Vivian | 1999-07-05 | 25 | Defender | 183 | 78 | Right | |
| 4 | Aitor Paredes | 2000-04-29 | 24 | Defender | 186 | 76 | Right | |
| 11 | Alvaro Djalo | 1999-08-16 | 25 | Forward | 175 | 71 | Right | |
| 8 | Oihan Sancet | 2000-04-25 | 24 | Midfielder | 188 | 72 | Right | |
| 10 | Nico Williams | 2002-07-12 | 22 | 181 | 67 | Right | ||
| 19 | Javier Marton | 1999-05-06 | 25 | 183 | 75 | Right | ||
| 24 | Benat Prados | 2001-02-08 | 23 | 180 | 75 | Right | ||
| 13 | Julen Agirrezabala | 2000-12-26 | 24 | 187 | 80 | Left | ||
| 22 | Nico Serrano | 2003-03-05 | 21 | 181 | 72 | Left | ||
| 20 | Unai Gomez | 2003-05-25 | 21 | 183 | 78 | Left | ||
| 34 | Oier Gastesi | 2003-10-30 | 21 | 190 | 84 | Right | ||
| 23 | Mikel Jauregizar | 2003-11-13 | 21 | 177 | 73 | Right | ||
| 33 | Aingeru Olabarrieta | 2005-11-14 | 19 | 182 | 76 | |||
| 32 | Adama Boiro | 2002-06-22 | 22 | 183 | 75 | Left | ||
| 28 | Peio Urtasan | 2005-01-17 | 19 | 179 | 68 | Right |