| 2ª B G2 | 25/08/13 | Peña Sport FC | - | Athletic Club B | 2:3 |  |
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| 2ª B G2 | 05/01/14 | Athletic Club B | - | Peña Sport FC | 2:0 |
| 2ª B G2 | 25/08/13 | Peña Sport FC | - | Athletic Club B | 2:3 | |
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| 2ª B G2 | 05/01/14 | Athletic Club B | - | Peña Sport FC | 2:0 |
| 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 |