| Tournament | Round | Derek McKenzie | Joan Colburt |
| 23.08.1998 Queensland Championships (QLD) | 12 | 412 | 370 |
| 11.10.1998 Greenbank (QLD) | 3 | 334 | 407 |
| 21.03.1999 Redcliffe (QLD) | 5 | 432 | 323 |
| 02.05.1999 Maelstrom (QLD) | 4 | 438 | 386 |
| Head-to-head after 4 games | 3 | 1 | |
| Average score | 404 | 371.5 | |
| Spread: | 130 | -130 | |