Callison, Justin
Current rating: 1436
Record: 9-13
| Grand Prix Houston 2016 (OGW standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 340 | Peace, John (1495) | Lost 0-2 | -181464 |
| 3standard | 443 | Flaming, Matthew (1500) | Won 2-0 | +191483 |
| 4standard | 120 | Roberson, Dustin (1498) | Lost 1-2 | -181465 |
| 5standard | 638 | LaMunyon, Josh (1521) | Lost 1-2 | -171448 |
| 6standard | 578 | Fleurant, Jason (1783) | Lost 1-2 | -121436 |
| top | average opponent: 1559record: 1-4 | new rating: 1436 | ||
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 109 | Lentz, Jared (1542) | Lost 1-2 | -171502 |
| 3modern | 357 | Simpson, Marshall (1455) | Won 0-0 | +171519 |
| 4modern | 365 | Henkelman, Scott (1487) | Lost 0-2 | -191500 |
| 5modern | 392 | Wilkinson, Dexter (1503) | Lost 0-2 | -181482 |
| top | average opponent: 1497record: 1-3 | new rating: 1482 | ||
| Grand Prix Denver 2015 (KTK standard) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 201 | Tomin, Brittani (1500) | Won 2-0 | +181534 |
| 2standard | 49 | Linder, Isaac (1465) | Won 2-0 | +171551 |
| 3standard | 239 | Yu, Ben (1765) | Lost 0-2 | -141537 |
| 4standard | 210 | Clark, Michael (1467) | Won 2-1 | +161553 |
| 5standard | 172 | Cohen, Zach (1503) | Lost 1-2 | -181535 |
| 6standard | 240 | Herren, Josh (1678) | Lost 1-2 | -161519 |
| top | average opponent: 1563record: 3-3 | new rating: 1519 | ||
| Grand Prix San Antonio 2014 (KTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 61 | Miller, Dustin (1526) | Won 2-1 | +181518 |
| 2standard | 142 | Sakakini, Thomas (1518) | Lost 1-2 | -181500 |
| 3standard | 270 | Garcia, Mario (1502) | Lost 0-2 | -181482 |
| 4standard | 503 | Benson, Taylor (1482) | Won 2-0 | +181500 |
| 5standard | 251 | Marks, Justin (1501) | Won 2-0 | +181518 |
| 6standard | 265 | Vickers, Brandon (1441) | Won 2-1 | +171535 |
| 7standard | 212 | Vivekanandan, Pradheep (1502) | Lost 0-2 | -191516 |
| top | average opponent: 1496record: 4-3 | new rating: 1516 | ||