| Under 17 Boys Friendly Fixtures |
| 26/09/2021 |
| 13:00 | Wanderers | vs | St Marys College RFC | Wanderers | More |
| Referee : Jack MacNeice Comment : Trial Game |
| 17/10/2021 |
| 13:00 | St Marys College RFC | vs | Ashbourne | St Marys | More |
| Referee : No Referee |
| Leinster U15 School/Youth League Ph1 Grp2 |
| 28/11/2021 |
| 12:00 | Dundalk | vs | St Marys College RFC | Dundalk | More |
|
| Leinster U18 School/Youth League Ph1 Grp1 |
| 05/12/2021 |
| 12:00 | Clane | vs | St Marys College RFC | Clane | More |
| Referee : John Cosgrave (Pending) |
| Leinster U17 School/Youth League Ph1 Grp2 |
| 05/12/2021 |
| 12:00 | Navan | vs | St Marys College RFC | Navan | More |
|
| Leinster U14 School Youth League Division 2 |
| 05/12/2021 |
| 12:00 | St Marys College RFC | vs | Boyne | St Marys | More |
| Referee : Marais van Zyl (Pending) |
| Leinster U13 School Youth League Division 2 Group 2 |
| 05/12/2021 |
| 12:00 | St Marys College RFC | vs | Old Wesley | St Marys | More |
|
| Leinster U14 School Youth League Division 2 |
| 09/01/2022 |
| 12:00 | St Marys College RFC | vs | Blackrock College RFC | St Marys | More |
|
| Leinster U13 School Youth League Division 2 Group 2 |
| 09/01/2022 |
| 12:00 | St Marys College RFC | vs | Westmanstown A | St Marys | More |
|
| 16/01/2022 |
| 00:00 | Coolmine | vs | St Marys College RFC | Coolmine | More |
|
| Leinster U14 School Youth League Division 2 |
| 16/01/2022 |
| 12:00 | Donnybrook | vs | St Marys College RFC | Energia Park | More |
|
| 13/02/2022 |
| 11:30 | Suttonians | vs | St Marys College RFC | Suttonians | More |
|
| Leinster U13 School Youth League Division 2 Group 2 |
| 13/02/2022 |
| 12:00 | St Marys College RFC | vs | St Brigids | St Marys | More |
|
| Leinster U17 School/Youth League Ph1 Grp2 |
| TBC |
| Arklow | vs | St Marys College RFC | Arklow | More |
| Referee : GAME OFF (Pending) |