Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 05/2021 |  | Saymon Alem | DF |  | FC Sion U16 | U16 |
| 04/2021 |  | Noah Vaudan | GK |  | FC Sion II | FC Sion II |
| 03/2021 | | Cédric Fux | MF | | FC Sion U16 | U16 |
| 03/2021 | | Nathan Borer | GK | | FC Sion U16 | U16 |
| 02/2021 | | Matteo Schmid | DF | | FC Sion U16 | U16 |
| 02/2021 | | Roméo Beney | FW | | FC Sion U16 | U16 |
| 01/2021 | | Noah Cuesta | FW | |||
| 07/2020 | | David De Kalbermatten | GK | | FC Sion U16 | U16 |
| 07/2020 | | Vitus Williner | GK | | FC Sion U16 | U16 |
| 07/2020 | | Matteo Biner | DF | | FC Sion U16 | U16 |
| 07/2020 | | Maxime Dubosson | DF | | FC Sion U16 | U16 |
| 07/2020 | | Léo Meyer | DF | | FC Sion U16 | U16 |
| 07/2020 | | Hugo Rard | MF | | FC Sion U16 | U16 |
| 07/2020 | | Alessio Schürmann | MF | | FC Sion U16 | U16 |
| 07/2020 |  | Eliott Barrois | FW | | FC Sion U16 | U16 |
| 07/2020 | | Edian Gashi | FW | | FC Sion U16 | U16 |
| 07/2020 | | Malsor Krasniqi | FW | | FC Sion U16 | U16 |
| 07/2020 |  | Audry Nsuka | FW | | FC Sion U16 | U16 |
| 07/2020 |  | Almin Omerovic | FW | | FC Sion U16 | U16 |
| 07/2020 | | Daniel Schröter | FW | | FC Sion U16 | U16 |
| 07/2020 | | Stéphane Sarni | MA | | FC Sion U16 | U16 |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 02/2021 |  | Aleksandr Fuks | FW |  | FK Rostov U20 | U20 |
| 07/2020 | | David Pellissier | DF |  | FC Sierre | FC Sierre |
| 07/2020 | | Sacha Debons | MF |  | FC Savièse | FC Savièse |
| 07/2020 | | Thomas Philippin | GK |  | FC Martigny Sports | Martigny Sports |
| 07/2020 | | Tom Gaillard | DF | | FC Sion II | FC Sion II |
| 07/2020 |  | André Gomes | MF | | FC Sion II | FC Sion II |
| 07/2020 | | Max Melly | MF | | FC Sion II | FC Sion II |