Yoon, Joseph
Current rating: 1487
Record: 5-6
| Grand Prix Atlanta 2015 (BFZ limited) | starting rating: 1505 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 712 | Rembert, Philip (1500) | Won 2-0 | +181523 |
| 2sealed | 326 | Fonseca, Oscar (1495) | Lost 1-2 | -191504 |
| 3sealed | 479 | Kelly, Daniel (1453) | Won 2-1 | +171521 |
| 4sealed | 319 | Soper, Alex (1511) | Lost 0-2 | -181503 |
| 5sealed | 473 | Boroughs, Luke (1607) | Lost 0-2 | -161487 |
| average opponent: 1513record: 2-3 | new rating: 1487 | |||
| Grand Prix Atlanta 2014 (JOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 557 | Brannen, Byron (1500) | Won 2-1 | +181518 |
| 2sealed | 434 | King, Mason (1645) | Won 2-0 | +201538 |
| 3sealed | 298 | McMahon, James (1527) | Won 2-0 | +181556 |
| 4sealed | 245 | Real, Enzo (1644) | Lost 0-2 | -161540 |
| 5sealed | 357 | Caudillo, Zac (1535) | Lost 1-2 | -181522 |
| 6sealed | 552 | Germann, Daniel (1589) | Lost 0-2 | -171505 |
| average opponent: 1574record: 3-3 | new rating: 1505 | |||