Amburgey, Brad
Current rating: 1478
Record: 11-13
| Grand Prix Miami 2015 (FRF standard) | starting rating: 1473 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 98 | Giacosa, Cesar (1450) | Won 2-1 | +171490 |
| 2standard | 108 | Fox, Adam M (1653) | Lost 1-2 | -151475 |
| 3standard | 475 | Berkenfield, Jonathan (1503) | Won 2-0 | +191494 |
| 4standard | 265 | Johnston, Richard (1605) | Lost 1-2 | -161478 |
| 5standard | 442 | Wozniak, Zack (1484) | Won 2-0 | +181496 |
| 6standard | 264 | Barnett, RJ (1518) | Lost 0-2 | -181478 |
| top | average opponent: 1536record: 3-3 | new rating: 1478 | ||
| Grand Prix Orlando 2012 (ISD standard) | starting rating: 1530 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 154 | Keedy, Joe (1500) | Lost 1-2 | -191511 |
| 2standard | 251 | Manley, Justin (1482) | Won 2-0 | +181529 |
| 3standard | 335 | Davis, Samuel B (1483) | Lost 1-2 | -191510 |
| 4standard | 355 | Bieringer, Michael (1481) | Lost 0-2 | -191491 |
| 5standard | 381 | Duvall, Aaron F (1462) | Lost 1-2 | -181473 |
| top | average opponent: 1482record: 1-4 | new rating: 1473 | ||
| Grand Prix Atlanta 2011 (extended) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 557 | Brewer, Josh (1500) | Lost 0-2 | -171447 |
| 2extended | 588 | Perkins, Joe (1482) | Won 2-1 | +191466 |
| 3extended | 602 | Beety, John Dale (1420) | Won 2-1 | +171483 |
| 4extended | 552 | Anderegg, Morgan (1536) | Won 2-0 | +191502 |
| 5extended | 537 | Yost, Brett (1480) | Won 2-1 | +171519 |
| 6extended | 467 | Mason, Eric (1588) | Lost 1-2 | -161503 |
| 7extended | 470 | Webster, Billy (1580) | Won 2-1 | +191522 |
| 8extended | 444 | Johnson, Jonathan C (1602) | Won 2-0 | +201542 |
| 9extended | 429 | Blohon, Lukas (1903) | Lost 1-2 | -121530 |
| top | average opponent: 1566record: 6-3 | new rating: 1530 | ||
| Grand Prix Tampa 2009 (ZEN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 232 | Perkins, Andrew (1500) | Won 2-0 | +181518 |
| 2sealed | 76 | Bolt, John (1518) | Lost 0-2 | -181500 |
| 3sealed | 283 | Villalpando, Mark (1522) | Lost 0-2 | -181482 |
| 4sealed | 283 | Lazaro, Barton A (1482) | Lost 0-2 | -181464 |
| top | average opponent: 1505record: 1-3 | new rating: 1464 | ||