| Tournament | Round | Mary McMahon | Doug Ristic |
| 14.09.2002 Melbourne 15 Minutes (VIC) | 8 | 332 | 373 |
| 28.01.2007 Ballarat Summer (VIC) | 2 | 457 | 277 |
| 28.01.2012 Ballarat Summer (VIC) | 6 | 348 | 359 |
| 19.08.2012 Midwinter (VIC) | 2 | 481 | 317 |
| 19.07.2015 Matchplay 2015 (VIC) | 5 | 388 | 291 |
| Head-to-head after 5 games | 3 | 2 | |
| Average score | 401.2 | 323.39 | |
| Spread: | 389 | -389 | |