Transfers
Recent player movements in and out of the squad
| Date | Player | From | To | Type |
|---|---|---|---|---|
| 01.07.2017 | Gorka Iraizoz Moreno | Athletic Club | Girona | Free |
| 01.07.2017 | Kike Sola | — | Athletic Club | N/A |
| 01.07.2017 | Murgoitio | Athletic Club | — | Loan |
| 01.07.2017 | Urtzi Iriondo | Athletic Club | Granada CF | Loan |
| 01.07.2017 | Gorka Santamaría | Cadiz | Athletic Club | N/A |
| 01.07.2017 | Asier Benito | Alaves | Athletic Club | N/A |
| 01.07.2017 | Íñigo Muñoz | — | Athletic Club | N/A |
| 01.07.2017 | Jonan Amelibia | — | Athletic Club | N/A |
| 01.07.2017 | Jonan Amelibia | Athletic Club | — | N/A |
| 01.07.2017 | Izaro Abella | — | Athletic Club | N/A |
| 01.07.2017 | Urtzi Urzelai | — | Athletic Club | N/A |
| 01.07.2017 | Iago Herrerín | Leganes | Athletic Club | N/A |
| 01.07.2017 | Ager Aketxe | Cadiz | Athletic Club | N/A |
| 01.07.2017 | Óscar Gil | Oviedo | Athletic Club | N/A |
| 01.07.2017 | Mikel Vesga | — | Athletic Club | N/A |
| 01.07.2017 | Unai López | Leganes | Athletic Club | N/A |
| 01.07.2017 | Asier Villalibre | — | Athletic Club | N/A |
| 15.06.2017 | Gorka Elustondo Urkola | Athletic Club | — | N/A |
| 03.05.2017 | Asier Villalibre | Athletic Club | — | Loan |
| 03.02.2017 | Álex Remiro | Levante | Athletic Club | N/A |
| 02.02.2017 | Oier Sarriegi | Athletic Club | — | Loan |
| 31.01.2017 | Ager Aketxe | Athletic Club | Cadiz | Loan |
| 30.01.2017 | Ander Alday Valverde | Athletic Club | — | Loan |
| 30.01.2017 | Kike Sola | Athletic Club | — | Loan |
| 30.01.2017 | Izaro Abella | Athletic Club | — | Loan |
| 29.01.2017 | Kike Sola | Getafe | Athletic Club | N/A |
| 25.01.2017 | Mikel Vesga | Athletic Club | — | Loan |
| 20.01.2017 | Odei Onaindia | Athletic Club | — | N/A |
| 19.01.2017 | Urtzi Urzelai | Athletic Club | — | Loan |
| 01.12.2016 | Iago Herrerín | Athletic Club | Leganes | Loan |
| 31.08.2016 | Kike Sola | Athletic Club | Getafe | Loan |
| 30.08.2016 | Borja Viguera Manzanares | Athletic Club | — | Free |
| 30.08.2016 | Markel Lozano | Athletic Club | — | Loan |
| 19.08.2016 | Oier Sarriegi | Athletic Club | — | Loan |
| 17.08.2016 | Julen Arellano Sandúa | Athletic Club | Osasuna | N/A |
| 17.08.2016 | Guillermo Fernández | Athletic Club | Elche | Free |
| 12.08.2016 | Jon Aurtenetxe | Athletic Club | — | Free |
| 11.08.2016 | Odei Onaindia | — | Athletic Club | € Free |
| 06.08.2016 | Xiker Ozerinjauregi | Athletic Club | — | N/A |
| 30.07.2016 | Ibai Gómez | Athletic Club | Alaves | Free |
| 26.07.2016 | Unai López | Athletic Club | Leganes | Loan |
| 20.07.2016 | Gorka Santamaría | Athletic Club | Cadiz | Loan |
| 19.07.2016 | Unai Bustinza | Athletic Club | Leganes | N/A |
| 18.07.2016 | Jon Koldo Iruarrizaga Arteche | Athletic Club | — | N/A |
| 18.07.2016 | Egoitz Magdaleno | Athletic Club | — | € Free |
| 13.07.2016 | Jonan Amelibia | Athletic Club | — | Loan |
| 12.07.2016 | Tarsi | — | Athletic Club | Free |
| 12.07.2016 | Iker Guarrotxena | Athletic Club | — | N/A |
| 12.07.2016 | Ruíz de Galarreta | Athletic Club | — | Free |
| 07.07.2016 | Jon Ander Felipe | Athletic Club | — | N/A |