| 2ª B G2 | 13/04/17 | Athletic Club B | - | SD Gernika | 2:1 |  |
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| 2ª B G2 | 26/08/17 | Real Sociedad B | - | Athletic Club B | 0:3 |
| 2ª B G2 | 13/04/17 | Athletic Club B | - | SD Gernika | 2:1 | |
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| 2ª B G2 | 26/08/17 | Real Sociedad B | - | Athletic Club B | 0:3 |
| Iker Undabarrena Martínez | |
| Born: | 18.05.1995 |
| Place of birth: |
Gorliz, 
Spain |
| Nationality: |
Spain
|
| Height: | 181 cm |
| Weight: | 77 kg |
| Position(s): | Central Midfielder Defensive Midfielder |
| Foot: | right |