Costello, Bryan C
Current rating: 1522
Record: 8-7
| Grand Prix Indianapolis 2013 (RTR limited) | starting rating: 1526 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 134 | Shen, Xiangyu (1483) | Lost 0-2 | -191507 |
| 2sealed | 255 | Sharoian, Jacob (1481) | Won 2-0 | +181525 |
| 3sealed | 224 | Austin B., (1502) | Won 2-1 | +171542 |
| 4sealed | 197 | Gillis, Daniel (1560) | Lost 0-2 | -171525 |
| 5sealed | 219 | Decker, Mike (1476) | Lost 1-2 | -191506 |
| 6sealed | 285 | Risner, James (1393) | Won 2-0 | +161522 |
| average opponent: 1483record: 3-3 | new rating: 1522 | |||
| Grand Prix Chicago 2012 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 279 | Guerra, Yannis S (1500) | Lost 0-2 | -181482 |
| 2modern | 353 | Rosales, Russell (1482) | Won 2-0 | +181500 |
| 3modern | 247 | Fairchild, Michael (1565) | Won 2-0 | +191519 |
| 4modern | 232 | Ward, Michael (1552) | Won 2-1 | +191538 |
| 5modern | 179 | Lo, Shong (1520) | Won 2-1 | +171555 |
| 6modern | 112 | Wienburg, Ben (1802) | Lost 1-2 | -131542 |
| 7modern | 252 | Kowal, Brian (1696) | Lost 0-2 | -151527 |
| 8modern | 217 | Baker, James M (1548) | Won 2-0 | +181545 |
| 9modern | 134 | Rodriguez, Jescy (1491) | Lost 0-2 | -191526 |
| average opponent: 1573record: 5-4 | new rating: 1526 | |||