Tournament Record - John Prosser In Welsh Amateur Championship
| Played | Winner | Final | Semi-final | Quarter-final | Last 16 | Last 32 | Prize Money | Centuries |
|---|---|---|---|---|---|---|---|---|
| 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Tournament | Finish | Prize Money (GBP) |
|---|---|---|
 1990 Welsh Amateur Championship |
Round 1 | 0 |
| 1984 Welsh Amateur Championship |
Last 64 | 0 |
| 1980 Welsh Amateur Championship |
Last 128 | 0 |
| 1976 Welsh Amateur Championship |
Last 16 | 0 |
| 1974 Welsh Amateur Championship |
Last 16 | 0 |
| 1972 Welsh Amateur Championship |
Quarter-final | 0 |
| 1969 Welsh Amateur Championship |
Final | 0 |
| 1968 Welsh Amateur Championship |
Round 2 | 0 |