Harrison, Joshua
Current rating: 1562
Record: 16-12
| Grand Prix Atlanta 2008 (ALA limited) | starting rating: 1585 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 136 | Osyda, Eric (1517) | Won 2-0 | +171602 |
| 3sealed | 107 | Seder, Robert (1649) | Won 2-0 | +191621 |
| 4sealed | 37 | Jones, Robert L (1562) | Lost 1-2 | -201601 |
| 5sealed | 59 | Cochran, Nicholas (1535) | Won 2-1 | +171618 |
| 6sealed | 99 | Greene, Christopher (1660) | Lost 0-2 | -171601 |
| 7sealed | 118 | Steinbach, Christopher L (1539) | Lost 1-2 | -191582 |
| 8sealed | 110 | [anonymous] | Lost 1-2 | -201562 |
| top | average opponent: 1563record: 3-4 | new rating: 1562 | ||
| Grand Prix Orlando 2004 (Mirrodin block) | starting rating: 1574 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 50 | Richards, Jake (1518) | Lost 0-2 | -191555 |
| 3block | 168 | Varsalona, Eric (1500) | Won 2-1 | +171572 |
| 4block | 149 | Savage, Dan (1466) | Won 2-0 | +161588 |
| 5block | 44 | Johnson, Timothy (1516) | Won 2-1 | +171605 |
| 6block | 47 | Vizaro, Justin (1555) | Lost 0-2 | -191586 |
| 7block | 77 | Pelak, Nick (1539) | Won 2-1 | +171603 |
| 8block | 27 | Lucy, J. Sawyer (1607) | Lost 1-2 | -181585 |
| top | average opponent: 1529record: 4-3 | new rating: 1585 | ||
| Grand Prix Atlanta 2003 (8ED standard) | starting rating: 1522 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 98 | Fowler, Quincey (1500) | Won 2-1 | +181540 |
| 2standard | 80 | Meredith, David (1517) | Lost 1-2 | -181522 |
| 3standard | 105 | Waters, Joshua (1499) | Won 2-0 | +171539 |
| 4standard | 102 | Darbro, Roy (1471) | Won 2-0 | +171556 |
| 5standard | 122 | Harvey, Mike (1538) | Won 2-0 | +181574 |
| 6standard | 55 | Kamihara, Ken (1534) | Won 2-1 | +171591 |
| 7standard | 30 | Hoaen, Rich (1637) | Lost 1-2 | -171574 |
| top | average opponent: 1528record: 5-2 | new rating: 1574 | ||
| Grand Prix New Orleans 2003 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 124 | Mayes, John (1500) | Won 2-0 | +181518 |
| 2extended | 45 | Mills, Justin (1518) | Lost 0-2 | -181500 |
| 3extended | 84 | Noland, Donald (1544) | Lost 0-2 | -171483 |
| 4extended | 145 | Kilpatrick, Robert (1368) | Won 2-1 | +161499 |
| 5extended | 123 | Elliott, Ross (1499) | Won 2-1 | +181517 |
| 6extended | 101 | Underwood, Justin (1518) | Won 2-1 | +181535 |
| 7extended | 77 | Jensen, William (1861) | Lost 0-2 | -131522 |
| top | average opponent: 1544record: 4-3 | new rating: 1522 | ||