Costanzo, David
Current rating: 1498
Record: 4-4
| Grand Prix San Jose 2017 (AER limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 295 | Perry, Michael (1478) | Lost 0-2 | -181482 |
| 2sealed | 687 | Nutt, Tyler (1492) | Lost 1-2 | -181464 |
| 3sealed | 814 | Gill, Prabhmeet (1464) | Won 2-0 | +181482 |
| 4sealed | 603 | Tran, Wilson (1484) | Lost 1-2 | -181464 |
| 5sealed | 780 | Chu, Melody (1433) | Won 2-1 | +171481 |
| 6sealed | 628 | Kearney, Dale (1431) | Won 2-1 | +171498 |
| 7sealed | 455 | Dudley, Mark (1499) | Won 2-0 | +181516 |
| 8sealed | 396 | Firestone, Spencer (1523) | Lost 1-2 | -181498 |
| average opponent: 1475record: 4-4 | new rating: 1498 | |||