Tournament Record - Sean O'Neill In World Under-21 Championship - Men
| Played | Winner | Final | Semi-final | Quarter-final | Last 16 | Last 32 | Prize Money | Centuries |
|---|---|---|---|---|---|---|---|---|
| 4 | 0 | 0 | 2 | 2 | 4 | 4 | 250 | 7 |
| Tournament | Finish | Prize Money (GBP) |
|---|---|---|
 2002 World Under-21 Championship - Men |
Quarter-final | 0 |
| 2001 World Under-21 Championship - Men |
Still competing | 0 |
| 2000 World Under-21 Championship - Men |
Quarter-final | 250 |
| 1999 World Under-21 Championship - Men |
Quarter-final | 0 |