Tournament Record - Mark Jeffreys In Guernsey Amateur Championship
| Played | Winner | Final | Semi-final | Quarter-final | Last 16 | Last 32 | Prize Money | Centuries |
|---|---|---|---|---|---|---|---|---|
| 13 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Tournament | Finish | Prize Money (GBP) |
|---|---|---|
 2025 Guernsey Amateur Championship |
Last 56 | 0 |
| 2024 Guernsey Amateur Championship |
Last 32 | 0 |
| 2023 Guernsey Amateur Championship |
Last 16 | 0 |
| 2022 Guernsey Amateur Championship |
Last 32 | 0 |
| 2021 Guernsey Amateur Championship |
Round 1 | 0 |
| 2020 Guernsey Amateur Championship |
Last 32 | 0 |
| 2019 Guernsey Amateur Championship |
Round 1 | 0 |
| 2017 Guernsey Amateur Championship |
Still competing | 0 |
| 2016 Guernsey Amateur Championship |
Last 32 | 0 |
| 2015 Guernsey Amateur Championship |
Last 32 | 0 |
| 2014 Guernsey Amateur Championship |
Round 1 | 0 |
| 2012 Guernsey Amateur Championship |
Last 16 | 0 |
| 2011 Guernsey Amateur Championship |
Last 32 | 0 |