| 1. Round | 10/04/2021 | Motherwell FC | - | St. Mirren FC | 1:0 |  |
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| 2. Round | 21/04/2021 | Ross County FC | - | St. Mirren FC | 1:3 | ||||
| 3. Round | 01/05/2021 | St. Mirren FC | - | Hamilton Academical | 1:2 |
| 1. Round | 10/04/2021 | Motherwell FC | - | St. Mirren FC | 1:0 | |
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| 2. Round | 21/04/2021 | Ross County FC | - | St. Mirren FC | 1:3 | ||||
| 3. Round | 01/05/2021 | St. Mirren FC | - | Hamilton Academical | 1:2 |
| Joseph Shaughnessy | |
| Born: | 06.07.1992 |
| Place of birth: |
Galway, 
Ireland |
| Nationality: |
Ireland
England |
| Height: | 183 cm |
| Weight: | 73 kg |
| Position(s): | Centre Back Right Back |
| Foot: | right |