| Tournament | Round | Mary McMahon | Phyllis Whitelaw |
| 08.02.1998 Camberwell (VIC) | 6 | 320 | 351 |
| 30.08.1998 Knox (VIC) | 6 | 342 | 360 |
| 17.04.1999 Knox-Gully (VIC) | 3 | 353 | 382 |
| 28.12.1999 Decathon (VIC) | 1 | 346 | 375 |
| Head-to-head after 4 games | 0 | 4 | |
| Average score | 340.25 | 367 | |
| Spread: | -107 | 107 | |