| Tournament | Round | Betty Irwin | Brian Irwin |
| 09.12.2001 ACT Championships (ACT) | 1 | 336 | 305 |
| 15.03.2009 Bomaderry March 2009 (NSW) | 8 | 325 | 304 |
| 16.05.2009 Ulladulla (NSW) | 8 | 299 | 347 |
| 31.10.2009 Nowra 2009 (NSW) | 1 | 332 | 326 |
| 18.09.2010 Ulladulla 2010 (NSW) | 7 | 436 | 277 |
| 06.11.2010 Nowra (NSW) | 4 | 379 | 276 |
| 15.05.2011 Ulladulla (NSW) | 6 | 370 | 348 |
| 20.05.2012 Ulladulla (NSW) | 10 | 523 | 267 |
| Head-to-head after 8 games | 7 | 1 | |
| Average score | 375 | 306.25 | |
| Spread: | 550 | -550 | |