Mathews, Donald
Current rating: 1481
Record: 3-4
| Grand Prix Providence 2011 (legacy) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 454 | Kopac, Matt (1381) | Won 2-0 | +161498 |
| 2legacy | 443 | Lambert, Eric B (1537) | Won 2-1 | +191517 |
| 3legacy | 453 | Merriam, Ross (1491) | Lost 0-2 | -191498 |
| 4legacy | 572 | Maher, Kevin R (1515) | Lost 0-2 | -171481 |
| average opponent: 1481record: 2-2 | new rating: 1481 | |||
| Grand Prix Boston 2009 (M10 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 508 | Husby, Tristan (1500) | Lost 1-2 | -181482 |
| 2sealed | 643 | Steinfeld, Eden (1482) | Won 2-1 | +181500 |
| 3sealed | 554 | Laferte, Jason (1495) | Lost 0-2 | -181482 |
| average opponent: 1492record: 1-2 | new rating: 1482 | |||