Preston, David
Current rating: 1279
Record: 0-13
| Grand Prix Dallas-Fort Worth 2016 (modern) | starting rating: 1392 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 349 | Lattimer, Shane (1526) | Lost 1-2 | -161376 |
| 2modern | 777 | Fowler, Michael (1484) | Lost 1-2 | -161360 |
| 3modern | 880 | Beck, Brad (1464) | Lost 0-2 | -161344 |
| 4modern | 923 | Jones, Hutton (1444) | Lost 1-2 | -161328 |
| 5modern | 939 | Welshons, Weston (1392) | Lost 0-2 | -171311 |
| 6modern | 866 | DeLeon, Christian (1410) | Lost 1-2 | -161295 |
| 7modern | 778 | Fudge, Taylor (1393) | Lost 0-2 | -161279 |
| average opponent: 1445record: 0-7 | new rating: 1279 | |||
| Grand Prix San Antonio 2012 (RTR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 161 | Boyette, Wesley (1501) | Lost 0-2 | -181482 |
| 2standard | 274 | Wishlewski, Michael (1483) | Lost 0-2 | -181464 |
| 3standard | 335 | Pilat, Larry (1465) | Lost 0-2 | -181446 |
| 4standard | 369 | White, Bernard (1446) | Lost 0-2 | -181428 |
| 5standard | 348 | Gustafson, Michael (1428) | Lost 0-2 | -181410 |
| 6standard | 301 | Richardson, William (1409) | Lost 0-2 | -181392 |
| average opponent: 1455record: 0-6 | new rating: 1392 | |||