Crumbley, David
Current rating: 1433
Record: 4-8
| Grand Prix Washington DC 2014 (JOU limited) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 135 | Yatsenko, Alex (1557) | Lost 0-2 | -161465 |
| 4sealed | 85 | Kassis, Eli (1641) | Lost 0-2 | -151450 |
| 5sealed | 333 | Rix, Jakob (1536) | Lost 0-2 | -171433 |
| average opponent: 1578record: 0-3 | new rating: 1433 | |||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 314 | Parker, Caleb a (1500) | Lost 0-2 | -181482 |
| 2sealed | 490 | Rechlin, Arlina (1482) | Won 2-0 | +181500 |
| 3sealed | 328 | Waterfield, Justin (1500) | Lost 1-2 | -181482 |
| 4sealed | 462 | Hiracheta, Devlin (1481) | Lost 0-2 | -181464 |
| 5sealed | 437 | Corbin, Julia (1431) | Lost 0-2 | -191445 |
| 6sealed | 361 | Wooden, Graham (1445) | Lost 1-2 | -181427 |
| 7sealed | 287 | Brooks, Eric (1429) | Won 2-0 | +181445 |
| 8sealed | 234 | Valdez, Jose (1444) | Won 2-0 | +181463 |
| 9sealed | 173 | Salter, Matthew (1463) | Won 2-0 | +181481 |
| average opponent: 1464record: 4-5 | new rating: 1481 | |||