| Premier League 2021 Conference L. Playoffs - Appearances as Assistant | ||||
| 01/06/2021 | Cliftonville FC | - | Crusaders FC | 5:4 pso |
| Premier League 2021 Conference L. Playoffs - Appearances as Assistant | ||||
| 01/06/2021 | Cliftonville FC | - | Crusaders FC | 5:4 pso |
| Complete name: | Mark O'Brien |
| Born: | |
| Place of birth: |
Northern Ireland |
| Nationality: |
Northern Ireland |