| 5. Round | 11/09/2021 | Halifax Town | - | Southend United | 3:1 |  |
|||
| 12. Round | 23/10/2021 | Dagenham & Redbridge | - | Southend United | 3:0 |
| 5. Round | 11/09/2021 | Halifax Town | - | Southend United | 3:1 | |
|||
| 12. Round | 23/10/2021 | Dagenham & Redbridge | - | Southend United | 3:0 |
| Harry John Seaden | |
| Born: | 23.04.2001 |
| Place of birth: |
Southend-on-Sea, 
England |
| Nationality: |
England
|
| Height: | 185 cm |
| Weight: | 85 kg |
| Position(s): | Goalkeeper |
| Foot: | right |