Johnston, Sean
Current rating: 1535
Record: 5-3
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 336 | Sol, Michael (1515) | Won 2-1 | +181518 |
| 2modern | 253 | Sawicki, Trent (1482) | Lost 0-2 | -181500 |
| 3modern | 677 | Lynch, Brandon (1415) | Won 2-0 | +161516 |
| 4modern | 737 | Brockway, Marc (1515) | Won 2-1 | +181534 |
| 5modern | 530 | Miller, Allen (1499) | Won 2-1 | +171551 |
| 6modern | 168 | Brodeur, John (1613) | Lost 0-2 | -161535 |
| 7modern | 350 | Hatch, Bryan (1535) | Lost 1-2 | -181517 |
| 8modern | 439 | Ewing, Ethan (1515) | Won 2-1 | +181535 |
| average opponent: 1511record: 5-3 | new rating: 1535 | |||