| Tournament | Round | John Barker | Sal Costanzo |
| 05.07.1998 High Country (VIC) | 6 | 300 | 406 |
| 05.10.1998 New South Wales Championships (NSW) | 10 | 441 | 383 |
| 21.01.1999 City of Sydney Masters (NSW) | 3 | 453 | 420 |
| 21.01.1999 City of Sydney Masters (NSW) | 17 | 526 | 308 |
| 14.06.1999 Victorian Championships (VIC) | 13 | 482 | 354 |
| 07.05.2000 NSW/Victoria Border Challenge Wagga Wagga (NSW) | 4 | 321 | 502 |
| 06.05.2001 NSW/Victoria Border Challenge Wagga Wagga (NSW) | 6 | 300 | 350 |
| 09.06.2001 Victorian Championships (VIC) | 19 | 454 | 329 |
| 05.05.2002 NSW/Victoria Border Challenge Wagga Wagga (NSW) | 8 | 453 | 359 |
| 27.01.2003 City of Sydney International Masters (NSW) | 4 | 472 | 407 |
| 04.05.2003 NSW/Victoria Border Challenge Wagga Wagga (NSW) | 5 | 471 | 388 |
| 14.09.2003 Melbourne Masters (VIC) | 10 | 485 | 366 |
| 02.05.2004 NSW/Victoria Border Challenge Wagga Wagga (NSW) | 2 | 426 | 341 |
| 07.06.2008 VIC CHAMPS (VIC) | 12 | 432 | 473 |
| 07.06.2008 VIC CHAMPS (VIC) | 17 | 431 | 380 |
| 13.09.2009 MASTERS AND STATE CHALLENGE TROPHY (NSW) | 5 | 374 | 458 |
| Head-to-head after 16 games | 11 | 5 | |
| Average score | 426.31 | 389 | |
| Spread: | 597 | -597 | |