| Tournament | Round | Jean Mackenzie | Keith Merritt |
| 22.02.1998 Ipswich (QLD) | 1 | 312 | 322 |
| 09.07.2000 Coominya Winter (QLD) | 5 | 342 | 302 |
| 14.09.2003 Toowoomba (QLD) | 4 | 308 | 341 |
| 12.09.2004 Toowoomba (QLD) | 4 | 367 | 310 |
| 11.09.2005 Toowoomba (QLD) | 6 | 365 | 294 |
| Head-to-head after 5 games | 3 | 2 | |
| Average score | 338.8 | 313.8 | |
| Spread: | 125 | -125 | |