Ko, Roy
Current rating: 1529
Record: 19-18
| Grand Prix Los Angeles 2014 (KTK standard) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 104 | Serrato, Codey (1518) | Won 2-0 | +181516 |
| 3standard | 248 | Parke, Jamie (2105) | Lost 0-2 | -81508 |
| 4standard | 522 | Rosellini, Jason (1704) | Won 2-1 | +211529 |
| 5standard | 337 | Guillen, Eric (1587) | Lost 1-2 | -171512 |
| 6standard | 419 | Rapadas, Edward (1522) | Won 2-1 | +181530 |
| 7standard | 218 | Weinreich, Brian (1458) | Lost 0-2 | -191511 |
| 8standard | 260 | Rosales, Ernesto (1521) | Won 2-0 | +181529 |
| top | average opponent: 1631record: 4-3 | new rating: 1529 | ||
| Grand Prix Phoenix 2014 (BNG standard) | starting rating: 1494 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 505 | Wilson, Michael (1429) | Won 2-0 | +161510 |
| 2standard | 304 | Navarro, Michael (1500) | Won 2-0 | +181528 |
| 3standard | 210 | Schenk, Joshua (1446) | Lost 0-2 | -191509 |
| 4standard | 274 | Krautmann, Wenzel (1816) | Lost 0-2 | -131496 |
| 5standard | 435 | Estrada II, Pedro (1500) | Won 2-0 | +181514 |
| 6standard | 348 | Neal, Chris (1592) | Lost 0-2 | -161498 |
| top | average opponent: 1547record: 3-3 | new rating: 1498 | ||
| Grand Prix Las Vegas 2013 (MMA limited) | starting rating: 1512 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 1385 | Jura, Thomas (1500) | Lost 0-2 | -181494 |
| top | record: 0-1 | new rating: 1494 | ||
| Grand Prix Portland 2013 (modern) | starting rating: 1510 | |||
| round | table | opponent (rating) | result | Δrating |
| 4modern | 96 | Humphreys, Daniel (1484) | Lost 0-2 | -191491 |
| 5modern | 175 | Steele, Thea (1528) | Lost 1-2 | -171474 |
| 6modern | 289 | Haney, Jeremy (1491) | Lost 0-2 | -181456 |
| 7modern | 241 | Goff, Robert (1508) | Won 2-1 | +191475 |
| 8modern | 166 | Selsing, Nicholas (1470) | Won 2-1 | +181493 |
| 9modern | 154 | Bannan, James (1539) | Won 2-0 | +191512 |
| top | average opponent: 1503record: 3-3 | new rating: 1512 | ||
| Grand Prix San Diego 2013 (modern) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 200 | Cart, Tim (1482) | Won 2-0 | +171573 |
| 3modern | 263 | Kossonogi, Ori (1615) | Lost 0-2 | -181555 |
| 4modern | 293 | Battle, Ray (1450) | Won 2-1 | +161571 |
| 5modern | 218 | Zhou, Tristan (1499) | Lost 1-2 | -191552 |
| 6modern | 264 | Tovar, Ricky (1463) | Won 2-0 | +171569 |
| 7modern | 222 | Bolding, Hunter (1460) | Lost 1-2 | -201549 |
| 8modern | 203 | Chang, Brandon (1469) | Lost 0-2 | -201529 |
| 9modern | 187 | Perry, Ben M (1448) | Lost 0-2 | -191510 |
| top | average opponent: 1486record: 3-5 | new rating: 1510 | ||
| Grand Prix Anaheim 2012 (Innistrad block) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 19 | Felker, Daniel (1500) | Won 2-1 | +181518 |
| 2block | 79 | Bateman, Ben (1505) | Won 2-0 | +181536 |
| 3block | 4 | Rudyak, Rada (1522) | Won 2-1 | +181554 |
| 4block | 27 | Jury, Nick (1447) | Won 2-1 | +161570 |
| 5block | 23 | Sharpy, Daniel (1554) | Lost 1-2 | -191551 |
| 6block | 124 | Callenback, Avery (1524) | Won 2-0 | +181569 |
| 7block | 67 | Black, Samuel (1882) | Lost 1-2 | -131556 |
| 8block | 147 | Kelly, Peter (1547) | Lost 0-2 | -181538 |
| 9block | 141 | Tabaldo, Brandon (1529) | Won 2-1 | +181556 |
| top | average opponent: 1557record: 6-3 | new rating: 1556 | ||