Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 05/2021 |  | Dani Unanue | MF | |||
| 05/2021 | | Izan Gutiérrez | FW | |||
| 04/2021 | | Markel Castillo | MF | |||
| 04/2021 | | Sergio López | DF | |||
| 03/2021 | | Andoitz Galdós | MA | |||
| 02/2021 | | Sergio García | FW | |||
| 11/2020 | | Carlos Santibañez | GK | |||
| 10/2020 | | Christian Guijarro | FW | |||
| 10/2020 |  | Matías Sánchez | DF | |||
| 10/2020 | | Adrián Vich | MF | |||
| 10/2020 | | Jaime Dios | FW |  | CD Vitoria | CD Vitoria |
| 10/2020 | | Haritz Albisua | MF | |||
| 09/2020 | | Goti | MF | |||
| 08/2020 | | David Morante | DF | |||
| 08/2020 | | Garai | MF |  | UD Las Palmas B | UD Las Palmas B |
| 08/2020 |  | Rely Cabral | FW | |||
| 08/2020 | | Yurrebaso | FW | |||
| 07/2020 | | De Miguel | GK | |||
| 07/2020 | | Roger Marcè | DF | |||
| 07/2020 | | Xabi Mayordomo | FW |  | Valencia CF B | Valencia B |
| 07/2020 | | Arturo Segado | MF |  | CD Badajoz | CD Badajoz |
| 07/2020 | | Jon Agirrezabala | DF |  | Barakaldo CF | Barakaldo CF |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2020 | | Jon Madrazo | FW |  | Real Unión | Real Unión |
| 07/2020 |  | Christophe Atangana | GK |  | Athletic Club B | Bilbao B |
| 07/2020 | | Egiluz | DF |  | CP Villarrobledo | CP Villarrobledo |
| 07/2020 | | Jon Vega | DF |  | Arenas de Getxo | Arenas de Getxo |
| 07/2020 | | Alain Ribeiro | MF | | CD Vitoria | CD Vitoria |
| 07/2020 | | Alex Iriondo | MF |  | CD Lealtad | Lealtad |
| 07/2020 | | Fran Sota | MF |  | CD Calahorra | CD Calahorra |
| 07/2020 | | Íñigo Ibargoien | MF | | Arenas de Getxo | Arenas de Getxo |