| Tournament | Round | Derek McKenzie | Joan Rosenthal |
| 04.04.1998 Hassall Grove (NSW) | 6 | 408 | 401 |
| 20.06.1998 Wollongong Marj Babb (NSW) | 6 | 302 | 454 |
| 12.07.1998 Chatswood (NSW) | 3 | 400 | 351 |
| 26.07.1998 Winter Masters (NSW) | 13 | 369 | 424 |
| 26.07.1998 Winter Masters (NSW) | 20 | 371 | 396 |
| 05.10.1998 New South Wales Championships (NSW) | 17 | 302 | 500 |
| 24.10.1998 Spring Marathon (NSW) | 3 | 279 | 389 |
| 24.10.1998 Spring Marathon (NSW) | 11 | 390 | 367 |
| 21.01.1999 City of Sydney Masters (NSW) | 14 | 438 | 392 |
| 21.01.1999 City of Sydney Masters (NSW) | 17 | 321 | 431 |
| 01.08.1999 Winter Masters (NSW) | 10 | 367 | 490 |
| 04.10.1999 New South Wales Championships (NSW) | 4 | 384 | 341 |
| 27.01.2002 City of Sydney International Masters (NSW) | 14 | 391 | 381 |
| 21.07.2002 Winter Masters (NSW) | 6 | 378 | 392 |
| Head-to-head after 14 games | 6 | 8 | |
| Average score | 364.28 | 407.78 | |
| Spread: | -609 | 609 | |