| Date | Tournament | State | Round | Joan Colburt | Derek McKenzie |
|---|---|---|---|---|---|
| 23/08/1998 | Queensland Championships | QLD | 12 | 370 | 412 |
| 11/10/1998 | Greenbank | QLD | 3 | 407 | 334 |
| 21/03/1999 | Redcliffe | QLD | 5 | 323 | 432 |
| 02/05/1999 | Maelstrom | QLD | 4 | 386 | 438 |
| Head-to-head after 4 games | 1 | 3 | |||
| Average score | 371.50 | 404.00 | |||
| Spread | -130 | 130 | |||