Dorsey, Jon
Current rating: 1468
Record: 7-9
| Grand Prix Los Angeles 2009 (extended) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 190 | Bunsongsikul, Ped (1635) | Lost 1-2 | -151467 |
| 2extended | 238 | Slomann, Scott (1482) | Lost 1-2 | -181449 |
| 3extended | 348 | Kirksey, Mike (1465) | Won 2-0 | +191468 |
| 4extended | 363 | Escobar, Nick (1482) | Won 2-0 | +181486 |
| 5extended | 281 | Stone, Tabitha (1462) | Won 2-0 | +181504 |
| 6extended | 197 | Chernin, Julian M (1519) | Won 2-0 | +181522 |
| 7extended | 173 | Chilk, Jonah (1550) | Lost 0-2 | -181504 |
| 8extended | 136 | Castaneda, Jesus (1519) | Lost 1-2 | -171487 |
| 9extended | 124 | Stayton, Scott (1469) | Lost 1-2 | -191468 |
| average opponent: 1509record: 4-5 | new rating: 1468 | |||
| Grand Prix Dallas 2007 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 16 | Brown, Brock (1500) | Won 2-0 | +181518 |
| 2extended | 79 | Blackman, Brett (1583) | Lost 0-2 | -171501 |
| 3extended | 276 | Trout, Wayne (1499) | Won 0-0 | +181519 |
| 4extended | 147 | Golenda, Steve (1485) | Lost 1-2 | -181501 |
| 5extended | 245 | Hall, Nicholas (1499) | Lost 1-2 | -181483 |
| 6extended | 221 | Fisher, Edward (1481) | Won 2-0 | +171500 |
| 7extended | 149 | Christie, Simon (1498) | Lost 0-2 | -181482 |
| average opponent: 1507record: 3-4 | new rating: 1482 | |||