Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2021 |  | René Montoto | MF | |||
| 07/2021 | | Javi Porrón | GK |  | Caudal Deportivo | Caudal |
| 07/2021 | | Agustín Porto | DF | |||
| 07/2021 | | Álex Menéndez | DF | |||
| 07/2021 | | Colo | DF |  | CD Ibiza | CD Ibiza |
| 07/2021 | | Rafael Felgueroso | DF | |||
| 07/2021 | | Adrián Llano | MF |  | UP Langreo | Langreo |
| 07/2021 | | Javier Meana | MF | |||
| 07/2021 | | Marcos Blanco | MF | |||
| 07/2021 | | Álvaro Viña | FW | |||
| 07/2021 | | Edu Font | FW |  | CD Covadonga | Covadonga |
| 07/2021 | | Iván De La Ballina | FW | |||
| 07/2021 | | Iván Roldán | FW | |||
| 07/2021 | | Zucu | FW |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2021 | | Dani Sandoval | FW |  | SD Huesca B | SD Huesca B |
| 07/2021 |  | Mateusz Kania | GK |  | RB Linense | Linense |
| 07/2021 | | Alex Iriondo | MF |  | Club Portugalete | Portugalete |
| 07/2021 |  | Paul Otia | DF |  | UD Llanera | UD Llanera |
| 07/2021 |  | Björn Bussmann | GK |  | Marino de Luanco | Luanco |
| 07/2021 | | Ander Gayoso | DF |  | CP Cacereño | Cacereño |
| 07/2021 | | Jordi Pola | DF |  | Sporting Gijón B | Sporting B |
| 07/2021 | | Juan López | MF | | UP Langreo | Langreo |
| 07/2021 | | Mera | MF |  | NEROCA FC | NEROCA FC |
| 07/2021 | | René Pérez | MF |  | Real Oviedo | Oviedo |
| 07/2021 | | Unai Hernández | MF |  | Gimnástica Torrelavega | Gim.Torrelavega |
| 07/2021 | | Álvaro García | FW |  | Urraca CF | Urraca CF |
| 07/2021 |  | Mboup Saha | FW | | UD Llanera | UD Llanera |