| event | round | table | player one | result | player two |
| Grand Prix San Diego 1999 | 8 | 27 | Kastle, Darwin (1775) | Lost 1-2 | O'Mahoney-Schwartz, Steven (1825) |
| Grand Prix Manchester 2000 | 7 | 3 | Kastle, Darwin (1953) | Won 2-1 | O'Mahoney-Schwartz, Steven (1816) |
| Grand Prix Manchester 2000 | 10 | 19 | Kastle, Darwin (1923) | Won 2-1 | O'Mahoney-Schwartz, Steven (1797) |
| Pro Tour Tokyo 2001 | 7 | 37 | Kastle, Darwin (1827) | Won 2-1 | O'Mahoney-Schwartz, Steven (1817) |