De Mattie, Jason
Current rating: 1362
Record: 1-9
| Grand Prix Cleveland 2015 (FRF limited) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 385 | Snyder, Aaron (1500) | Lost 1-2 | -171431 |
| 2sealed | 606 | Cubberley, James (1482) | Lost 0-2 | -171414 |
| 3sealed | 769 | Plazek, Joseph (1464) | Lost 0-2 | -171397 |
| 4sealed | 807 | Rowe, Ryan (1404) | Lost 0-2 | -181379 |
| 5sealed | 718 | Delaney, Randy (1428) | Lost 0-2 | -171362 |
| average opponent: 1456record: 0-5 | new rating: 1362 | |||
| Grand Prix Washington DC 2013 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 69 | Grybel, Robert (1500) | Won 2-0 | +181518 |
| 2legacy | 195 | Fischer, Justin (1508) | Lost 0-2 | -181500 |
| 3legacy | 404 | Kenney, Matt (1503) | Lost 0-2 | -181482 |
| 4legacy | 670 | Davis, Isaac (1561) | Lost 0-2 | -171465 |
| 5legacy | 706 | Smith, Buddy (1489) | Lost 0-2 | -171448 |
| average opponent: 1512record: 1-4 | new rating: 1448 | |||