| Tournament | Round | Brian Irwin | Denis Mahon |
| 21.05.2000 Ulladulla (NSW) | 3 | 306 | 294 |
| 21.05.2000 Ulladulla (NSW) | 14 | 250 | 200 |
| 22.06.2002 Wollongong Marj Babb (NSW) | 7 | 351 | 344 |
| 22.02.2006 Ulladulla Summer Games Wednesday (NSW) | 5 | 318 | 353 |
| Head-to-head after 4 games | 3 | 1 | |
| Average score | 306.25 | 297.75 | |
| Spread: | 34 | -34 | |