Clark, Preston
Current rating: 1622
Record: 16-8
| Grand Prix Dallas-Fort Worth 2015 (ORI limited) | starting rating: 1624 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 533 | Russell, Ronnie (1466) | Won 2-1 | +151639 |
| 2sealed | 67 | Strawn, Joshua (1444) | Won 2-0 | +141653 |
| 3sealed | 276 | Bush, Cory (1533) | Won 2-1 | +161669 |
| 4sealed | 121 | Pieper, Jeff (1538) | Won 2-1 | +161685 |
| 5sealed | 30 | Ho, William (1573) | Lost 1-2 | -201665 |
| 6sealed | 52 | Brubaker, Michael (1553) | Lost 1-2 | -201645 |
| 7sealed | 221 | Feil, Derek (1631) | Won 2-1 | +171662 |
| 8sealed | 157 | Hicks, Theodore (1503) | Lost 1-2 | -211641 |
| 9sealed | 192 | Crouse, Sean (1538) | Lost 0-2 | -191622 |
| average opponent: 1531record: 5-4 | new rating: 1622 | |||
| Grand Prix San Antonio 2014 (KTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 203 | Roberts, Christopher (1500) | Won 2-0 | +181518 |
| 2standard | 154 | Ramos, Michael (1434) | Won 2-1 | +161534 |
| 3standard | 65 | Garcia, Daniel [USA] (1518) | Lost 1-2 | -181516 |
| 4standard | 237 | Acosta, Danny (1483) | Won 2-0 | +181534 |
| 5standard | 201 | Bolinger, Alexander (1516) | Won 2-1 | +171551 |
| 6standard | 76 | Ball, Nathan (1541) | Won 2-1 | +181569 |
| 7standard | 72 | Slingerland, Maxfield (1604) | Won 2-1 | +191588 |
| 8standard | 28 | Gibbs, Jordan (1537) | Won 2-0 | +171605 |
| 9standard | 6 | Schelling, Joseph (1575) | Lost 0-2 | -191586 |
| 10standard | 56 | Condon, Alex (1551) | Won 2-0 | +181604 |
| 11standard | 11 | C, Mark (1613) | Won 2-1 | +181622 |
| 12standard | 12 | Smith, Nathaniel (1591) | Won 2-1 | +171639 |
| 13standard | 12 | Bryan, Benjamin (1647) | Won 2-0 | +181657 |
| 14standard | 5 | Gay, Randall (1708) | Lost 0-2 | -171640 |
| 15standard | 13 | Dresslar, Maxwell (1710) | Lost 1-2 | -161624 |
| average opponent: 1568record: 11-4 | new rating: 1624 | |||