| Tournament | Round | Betty Irwin | Jon Strang |
| 05.06.1999 Wollongong Marj Babb (NSW) | 5 | 313 | 312 |
| 31.10.2009 Nowra 2009 (NSW) | 11 | 293 | 317 |
| 18.09.2010 Ulladulla 2010 (NSW) | 10 | 427 | 337 |
| 06.11.2010 Nowra (NSW) | 2 | 382 | 375 |
| Head-to-head after 4 games | 3 | 1 | |
| Average score | 353.75 | 335.25 | |
| Spread: | 74 | -74 | |