Tournament Record - Sean McMahon In Northern Ireland Amateur Championship
| Played | Winner | Final | Semi-final | Quarter-final | Last 16 | Last 32 | Prize Money | Centuries |
|---|---|---|---|---|---|---|---|---|
| 9 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Tournament | Finish | Prize Money (GBP) |
|---|---|---|
 1982 Northern Ireland Amateur Championship |
Last 64 | 0 |
| 1975 Northern Ireland Amateur Championship |
Final | 0 |
| 1968 Northern Ireland Amateur Championship |
Last 64 | 0 |
| 1967 Northern Ireland Amateur Championship |
Quarter-final | 0 |
| 1966 Northern Ireland Amateur Championship |
Quarter-final | 0 |
| 1965 Northern Ireland Amateur Championship |
Last 16 | 0 |
| 1964 Northern Ireland Amateur Championship |
Last 32 | 0 |
| 1963 Northern Ireland Amateur Championship |
Quarter-final | 0 |
| 1962 Northern Ireland Amateur Championship |
Winner | 0 |