Ullman, Byron
Current rating: 1456
Record: 10-12 (GP) / 2-5 (professional)
| Grand Prix Austin 2020 (modern) | starting rating: 1473 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 171 | Gallup, Matthew (1500) | Lost 0-2 | -171456 |
| top | record: 0-1 | new rating: 1456 | ||
| Grand Prix Houston 2013 (DGM limited) | starting rating: 1444 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 349 | Williams, Steven M (1478) | Won 2-0 | +191463 |
| 2sealed | 36 | Hung Jr, David (1518) | Won 2-0 | +191482 |
| 3sealed | 366 | Zandi, Jeff (1557) | Lost 1-2 | -171465 |
| 4sealed | 195 | Ferri, Michael (1556) | Won 2-0 | +201485 |
| 5sealed | 220 | Carson, Erik (1582) | Won 2-0 | +201505 |
| 6sealed | 120 | Alfred, Lyall (1706) | Lost 0-2 | -151490 |
| 7sealed | 178 | McCaffery, John (1541) | Lost 1-2 | -171473 |
| top | average opponent: 1563record: 4-3 | new rating: 1473 | ||
| Grand Prix Orlando 2012 (ISD standard) | starting rating: 1476 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 23 | Sevaux, Yoann (1581) | Won 2-1 | +201496 |
| 3standard | 45 | Cao, William (1515) | Won 2-1 | +181514 |
| 4standard | 4 | Auburn, Andrew (1444) | Lost 1-2 | -191495 |
| 5standard | 137 | Pazel, John (1493) | Lost 1-2 | -181477 |
| 6standard | 273 | Fuller, Kevin (1485) | Won 2-1 | +181495 |
| 7standard | 167 | Iglesias, John (1622) | Lost 1-2 | -151480 |
| 8standard | 186 | Quittmeyer, Charles (1494) | Lost 0-2 | -181462 |
| 9standard | 200 | Shepherd, Jessie (1500) | Lost 0-2 | -181444 |
| top | average opponent: 1517record: 3-5 | new rating: 1444 | ||
| Pro Tour Nagoya 2011 (Scars block) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 14 | Fagnoni, Bertrand (1566) | Lost 0-2 | -171485 |
| 2block | 179 | Tagi-Zade, Eldar (1799) | Lost 0-2 | -131472 |
| 3block | 180 | Takahashi, Yuta (1938) | Lost 0-2 | -101462 |
| 4block | 181 | Yasuda, Masayuki (1550) | Lost 1-2 | -161446 |
| 5block | 176 | Kastner, Donald (1742) | Won 2-1 | +231469 |
| 6draft | 153 | Job, Jonathan (1651) | Won 2-1 | +211490 |
| 7draft | 42 | Ganz, Andreas (1701) | Lost 0-2 | -141476 |
| top | average opponent: 1706record: 2-5 | new rating: 1476 | ||
| Grand Prix Atlanta 2011 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 416 | Noel, Michael (1447) | Won 2-0 | +171517 |
| 2extended | 479 | Klauk, John (1596) | Won 2-1 | +191536 |
| 3extended | 450 | Wise, Nicholas (1518) | Won 2-1 | +181554 |
| 4extended | 463 | Belfatto, Michael (1597) | Lost 1-2 | -171537 |
| 5extended | 510 | Wildes, Chris (1625) | Lost 1-2 | -161521 |
| 6extended | 524 | Usary, Marsh (1470) | Lost 0-2 | -191502 |
| top | average opponent: 1542record: 3-3 | new rating: 1502 | ||