Clark, David J
Current rating: 1347
Record: 11-21-1
| Grand Prix Cleveland 2015 (FRF limited) | starting rating: 1380 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 548 | Skibbe, Casey (1464) | Lost 0-2 | -171363 |
| 2sealed | 640 | Gerthoffer, Brett (1482) | Lost 0-2 | -161347 |
| top | average opponent: 1473record: 0-2 | new rating: 1347 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1412 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 1769 | Fang, Stephen (1448) | Lost 0-2 | -181394 |
| 2legacy | 1817 | Schwartz, Stephen (1520) | Draw 1-1 | +31397 |
| 3legacy | 1960 | Bourque, Francois (1449) | Lost 0-2 | -171380 |
| top | average opponent: 1472record: 0-2-1 | new rating: 1380 | ||
| Grand Prix Chicago 2014 (JOU standard) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 208 | Wood, Christian (1500) | Lost 0-2 | -171449 |
| 2standard | 328 | Dean, Zach (1378) | Lost 0-2 | -201429 |
| 3standard | 471 | Mills, Joseph D (1442) | Lost 0-2 | -171412 |
| top | average opponent: 1440record: 0-3 | new rating: 1412 | ||
| Grand Prix Atlanta 2012 (legacy) | starting rating: 1479 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 83 | Meier, Ryan (1454) | Lost 0-2 | -191460 |
| 3legacy | 214 | George, Brent (1576) | Lost 1-2 | -161444 |
| 4legacy | 357 | Penn, Lucius (1480) | Won 2-1 | +191463 |
| 5legacy | 317 | Long, Mike (1482) | Won 2-0 | +181481 |
| 6legacy | 247 | Ross-Latour, Jeremie (1634) | Lost 0-2 | -151466 |
| top | average opponent: 1525record: 2-3 | new rating: 1466 | ||
| Grand Prix Providence 2011 (legacy) | starting rating: 1512 | |||
| round | table | opponent (rating) | result | Δrating |
| 4legacy | 38 | Koven, Robert (1583) | Lost 0-2 | -171495 |
| 5legacy | 104 | Hall, Daniel W (1537) | Lost 0-2 | -171478 |
| 6legacy | 161 | Liao, Steven (1501) | Won 2-0 | +181496 |
| 7legacy | 62 | Bentley, Johnathan (1518) | Lost 1-2 | -171479 |
| top | average opponent: 1535record: 1-3 | new rating: 1479 | ||
| Grand Prix Atlanta 2011 (extended) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 495 | Cerino, Matthew (1534) | Lost 1-2 | -171452 |
| 2extended | 549 | McCormack, Alan (1482) | Won 2-0 | +191471 |
| 3extended | 566 | Tessler, Jonathan (1555) | Won 2-1 | +191490 |
| 4extended | 557 | Bianchi, Anthony (1517) | Won 2-1 | +191509 |
| 5extended | 479 | Baugh, Walter (1536) | Won 2-1 | +181527 |
| 6extended | 454 | Lum, Jonathan (1601) | Lost 0-2 | -161511 |
| 7extended | 475 | Karem, Laura (1643) | Won 2-1 | +201531 |
| 8extended | 457 | Russ, Oliver (1461) | Lost 1-2 | -191512 |
| top | average opponent: 1541record: 5-3 | new rating: 1512 | ||
| Grand Prix Nashville 2010 (SOM limited) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 439 | Boyd, Khaatim (1500) | Lost 1-2 | -171446 |
| 3sealed | 542 | Meadors, John (1579) | Won 2-1 | +201466 |
| 4sealed | 625 | Smith, Joe (1518) | Won 2-1 | +191485 |
| 5sealed | 538 | Parson, Lukas (1578) | Lost 1-2 | -161469 |
| top | average opponent: 1544record: 2-2 | new rating: 1469 | ||
| Grand Prix Chicago 2009 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 200 | Epelbaum, Thomas (1500) | Lost 1-2 | -181482 |
| 2legacy | 363 | Dolan, Eric (1446) | Won 2-0 | +171499 |
| 3legacy | 321 | Johnson, Peter J (1500) | Lost 1-2 | -181481 |
| 4legacy | 488 | Sy, Master Matthew (1481) | Lost 0-2 | -181463 |
| top | average opponent: 1482record: 1-3 | new rating: 1463 | ||