Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 03.08.2014 | Iker Guarrotxena | Athletic Club | — | Loan |
| 31.07.2014 | Borja Ekiza Imaz | Athletic Club | — | N/A |
| 28.07.2014 | Jon Ander Felipe | Athletic Club | — | Loan |
| 28.07.2014 | Mikel Fernández | Athletic Club | — | N/A |
| 19.07.2014 | Iñigo Pérez | Athletic Club | — | Free |
| 18.07.2014 | Xabier Etxebarría Larrabide | Athletic Club | — | N/A |
| 15.07.2014 | Unai Albizua | Athletic Club | — | Loan |
| 10.07.2014 | Enric Saborit | Athletic Club | Mallorca | Loan |
| 07.07.2014 | Jonxa Vidal | Athletic Club | — | N/A |
| 07.07.2014 | Jon García | Athletic Club | — | N/A |
| 03.07.2014 | Íñigo Eguaras | Athletic Club | — | Free |
| 02.07.2014 | Mikel Vesga | Alaves | Athletic Club | N/A |
| 01.07.2014 | Ander Herrera | Athletic Club | Manchester United | € 37M |
| 01.07.2014 | Borja Viguera Manzanares | Alaves | Athletic Club | N/A |
| 01.07.2014 | Mikel Juaristi Ariznabarreta | — | Athletic Club | N/A |
| 01.07.2014 | Mikel Orbegozo | Athletic Club | Getafe | Free |
| 01.07.2014 | Gorka Magunazelaia | Athletic Club | Oviedo | N/A |
| 01.07.2014 | Ander Artabe | — | Athletic Club | N/A |
| 01.07.2014 | Jon Aurtenetxe | Celta Vigo | Athletic Club | N/A |
| 01.07.2014 | Jon Etxaniz | Athletic Club | — | N/A |
| 30.06.2014 | Mikel Orbegozo | — | Athletic Club | N/A |
| 31.01.2014 | Iñigo Pérez | Mallorca | Athletic Club | N/A |
| 22.08.2013 | Jon Aurtenetxe | Athletic Club | Celta Vigo | Loan |
| 21.08.2013 | Mikel Rico | Granada CF | Athletic Club | € 2.8M |
| 20.08.2013 | Iñigo Pérez | Athletic Club | Mallorca | Loan |
| 20.08.2013 | Ander Artabe | Athletic Club | — | Loan |
| 20.08.2013 | Jon Etxaniz | Athletic Club | — | Loan |
| 12.08.2013 | Jonás Ramalho | Athletic Club | Girona | Loan |
| 07.08.2013 | Lander Yurrebaso | Athletic Club | — | N/A |
| 06.08.2013 | Ruíz de Galarreta | Athletic Club | — | Loan |
| 31.07.2013 | Asier Goti | Athletic Club | — | N/A |
| 23.07.2013 | Galder Cerrajería | Athletic Club | — | N/A |
| 20.07.2013 | Eraso | Athletic Club | Leganes | N/A |
| 18.07.2013 | Isma López | Athletic Club | — | Free |
| 16.07.2013 | Álvaro Peña | Athletic Club | — | Free |
| 15.07.2013 | Mikel Orbegozo | Athletic Club | — | Loan |
| 12.07.2013 | Diego Royo | Athletic Club | — | Free |
| 10.07.2013 | Mario Barco | — | Athletic Club | N/A |
| 10.07.2013 | Raúl Fernández | Athletic Club | — | Loan |
| 04.07.2013 | Kike Sola | Osasuna | Athletic Club | N/A |
| 03.07.2013 | Igor Martínez Caseras | Athletic Club | — | Free |
| 01.07.2013 | Fernando Gabriel Amorebieta Mardaras | Athletic Club | Fulham | Free |
| 01.07.2013 | Jon Koldo Iruarrizaga Arteche | — | Athletic Club | N/A |
| 01.07.2013 | Igor Arnáez | — | Athletic Club | N/A |
| 01.07.2013 | Beñat | Real Betis | Athletic Club | € 8M |
| 01.07.2013 | Fernando Llorente | Athletic Club | Juventus | Free |
| 01.07.2013 | Balenziaga | Valladolid | Athletic Club | N/A |
| 01.07.2013 | Iago Herrerín | — | Athletic Club | N/A |
| 01.07.2013 | Sabin Merino | — | Athletic Club | N/A |
| 30.06.2013 | Mikel Orbegozo | — | Athletic Club | N/A |