| Tournament | Round | Betty Irwin | Karmel Patterson |
| 20.02.2007 Ulladulla Summer Games Tuesday (NSW) | 3 | 339 | 399 |
| 21.02.2007 Ulladulla Summer Games Wednesday (NSW) | 3 | 279 | 419 |
| 18.09.2010 Ulladulla 2010 (NSW) | 9 | 447 | 338 |
| 20.05.2012 Ulladulla (NSW) | 8 | 330 | 407 |
| Head-to-head after 4 games | 1 | 3 | |
| Average score | 348.75 | 390.75 | |
| Spread: | -168 | 168 | |