Matussak, John
Current rating: 1541
Record: 7-6
| Grand Prix Phoenix 2017 (XLN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 216 | Dawson, Noel (1500) | Won 2-1 | +181518 |
| 2sealed | 46 | Styskal, Matthew (1642) | Won 2-1 | +201538 |
| 3sealed | 100 | Landey, Lee (1536) | Won 2-0 | +181556 |
| 4sealed | 50 | Yurchick, Adam (1726) | Lost 0-2 | -151541 |
| 5sealed | 160 | Bircher, Ryan (1535) | Won 2-1 | +181559 |
| 6sealed | 138 | Calcano, Christian (2034) | Lost 0-2 | -101549 |
| 7sealed | 194 | Putnam, Tyler (1855) | Won 2-1 | +241573 |
| 8sealed | 83 | Yu, Ben (1853) | Lost 1-2 | -141559 |
| 9sealed | 174 | Poole, Erik (1542) | Lost 1-2 | -181541 |
| average opponent: 1691record: 5-4 | new rating: 1541 | |||
| Grand Prix San Jose 2017 (AER limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 57 | Kelly, Brett (1484) | Won 2-0 | +181518 |
| 2sealed | 412 | Soroka, Roman (1521) | Lost 0-2 | -181500 |
| 3sealed | 464 | Olmstead, Hunter (1447) | Won 2-0 | +171517 |
| 4sealed | 227 | Nguyen, Travis (1576) | Lost 0-2 | -171500 |
| average opponent: 1507record: 2-2 | new rating: 1500 | |||