Shaddon, David
Current rating: 1338
Record: 13-25-1
| Grand Prix Dallas-Fort Worth 2016 (modern) | starting rating: 1415 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 215 | Adams, Justyn (1500) | Lost 0-2 | -171398 |
| 2modern | 766 | Sager, Scott (1404) | Lost 1-2 | -181380 |
| 3modern | 846 | Browne, Chazz (1463) | Lost 0-2 | -161364 |
| 4modern | 971 | Rockwell, Jeff (1446) | Lost 0-2 | -171347 |
| 5modern | 936 | Gardea, Ramon (1427) | Lost 1-2 | -161331 |
| 6modern | 867 | Powell, Drew (1411) | Won 2-0 | +191350 |
| 7modern | 773 | Williams, Michael (1539) | Won 2-0 | +221372 |
| 8modern | 635 | Harris, Ryan (1417) | Lost 0-2 | -171355 |
| 9modern | 554 | Putty, Jamey (1430) | Lost 0-2 | -171338 |
| top | average opponent: 1449record: 2-7 | new rating: 1338 | ||
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1396 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 291 | Paris, Patrick (1541) | Won 2-1 | +211417 |
| 3modern | 241 | Lee, Michelle (1597) | Won 0-0 | +211438 |
| 4modern | 136 | Lopez, Chris (1647) | Lost 1-2 | -141424 |
| 5modern | 1027 | Allen, Aden (1567) | Lost 1-2 | -161408 |
| 6modern | 347 | Madrid, Cullen (1517) | Won 2-0 | +201428 |
| 7modern | 223 | Hicks, Jackson (1507) | Won 2-0 | +201448 |
| 8modern | 138 | Courtright, Kevin (1495) | Lost 0-2 | -171431 |
| 9modern | 156 | Kohli, Jonathon (1538) | Lost 1-2 | -161415 |
| top | average opponent: 1551record: 4-4 | new rating: 1415 | ||
| Grand Prix Dallas-Fort Worth 2015 (ORI limited) | starting rating: 1414 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 470 | Chen, Shan Chun (1696) | Lost 1-2 | -131401 |
| 2sealed | 536 | Bruce, Steven (1488) | Lost 0-2 | -161385 |
| 3sealed | 719 | Campbell, Nathan (1479) | Lost 0-2 | -161369 |
| 4sealed | 735 | Carrera, Gordy (1447) | Won 2-0 | +191388 |
| 5sealed | 639 | Nguyen, Steve (1447) | Lost 1-2 | -171371 |
| 6sealed | 539 | Galoway, Garret (1446) | Won 2-0 | +201391 |
| 8sealed | 321 | Irwin, Russell (1514) | Lost 0-2 | -161375 |
| 9sealed | 257 | Nguyen, Edward (1563) | Won 2-1 | +211396 |
| top | average opponent: 1510record: 3-5 | new rating: 1396 | ||
| Grand Prix Memphis 2015 (FRF standard) | starting rating: 1442 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 129 | Russell, Ronnie (1505) | Lost 1-2 | -171425 |
| 2standard | 331 | Worrell, Curtis (1482) | Won 2-0 | +191444 |
| 3standard | 255 | Miller, James (1534) | Lost 0-2 | -161428 |
| 4standard | 427 | Justice, Daniel (1484) | Lost 1-2 | -171411 |
| 5standard | 414 | Swindle, Taylor (1465) | Lost 0-2 | -171394 |
| 6standard | 383 | Shrum, Edgar (1406) | Won 2-1 | +181412 |
| 7standard | 297 | Hunt, Christopher (1455) | Lost 1-2 | -171395 |
| 8standard | 246 | Holcomb, Jim (1448) | Won 2-1 | +191414 |
| 9standard | 206 | Jackson, Kristopher (1456) | Draw 1-1 | 01414 |
| top | average opponent: 1471record: 3-5-1 | new rating: 1414 | ||
| Grand Prix Nashville 2012 (DKA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 170 | Chandler, Dustin J (1429) | Lost 1-2 | -191481 |
| 2sealed | 286 | Smith, Spencer (1450) | Lost 0-2 | -191462 |
| 3sealed | 397 | Mabie, Elise (1463) | Won 2-0 | +181480 |
| 4sealed | 376 | Davies, Gareth (1434) | Lost 0-2 | -191461 |
| 5sealed | 424 | Crews, Matt (1383) | Lost 0-2 | -191442 |
| top | average opponent: 1432record: 1-4 | new rating: 1442 | ||