Harker, Matthew
Current rating: 1487
| Grand Prix Las Vegas 2015 (1) (MM2 limited) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 140 | Scott, Matt (1554) | Won 2-1 | +201482 |
| 2sealed | 83 | Harris, Ian (1520) | Won 2-1 | +181500 |
| 3sealed | 59 | Peltier, John (1505) | Lost 0-2 | -181482 |
| 4sealed | 187 | Russell, Marco (1489) | Won 2-0 | +181500 |
| 5sealed | 71 | Gentry, Cory (1534) | Lost 0-2 | -171483 |
| 6sealed | 117 | Ang, Wei Zou (1654) | Won 2-1 | +211504 |
| 7sealed | 90 | Mach, Frankie (1562) | Lost 1-2 | -171487 |
| top | average opponent: 1545record: 4-3 | new rating: 1487 | ||
| Grand Prix Baltimore 2014 (KTK limited) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 76 | Zung, Stacy (1566) | Won 2-0 | +201467 |
| 4sealed | 119 | Izsak, Gabby (1674) | Lost 0-2 | -141453 |
| 5sealed | 121 | Bruce, Adam (1543) | Won 2-0 | +191472 |
| 6sealed | 97 | Esposito, Michael (1674) | Won 2-1 | +221494 |
| 7sealed | 35 | Silberman, Philip (1787) | Lost 1-2 | -131481 |
| 8sealed | 74 | Jannati, Navid (1416) | Lost 1-2 | -191462 |
| top | average opponent: 1610record: 3-3 | new rating: 1462 | ||
| Grand Prix Washington DC 2014 (JOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 154 | Murphy, Matt (1520) | Lost 0-2 | -181482 |
| 2sealed | 472 | Salo, Chad (1571) | Lost 1-2 | -161466 |
| 3sealed | 623 | Freeman, Denise (1398) | Lost 0-2 | -191447 |
| top | average opponent: 1496record: 0-3 | new rating: 1447 | ||