Teams Oliver Armstrong played for
| Minor Counties Twenty20 | Oxfordshire (2024) |
| Home Counties Premier League | Oxford Downs (2024) |
| National Village Knockout | Oxford Downs (2022-2023) |
| Under-14 County Cup | Oxfordshire Under-14s (2019) |
| Under-18 County Cup | Oxfordshire Under-18s (2021-2023) |
| Under-18 County Championship | Oxfordshire Under-18s (2022-2023) |
| Under-18 Twenty20 | Oxfordshire Under-18s (2022-2023) |
| Miscellaneous | Oxfordshire Under-18s (2022) |
| Oxford Downs (2024) |
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