Harrington, Sean
Current rating: 1463
Record: 3-5
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 114 | Tessmer, Joseph (1450) | Lost 0-2 | -191462 |
| 2modern | 982 | Pratte, Stephen (1482) | Won 2-1 | +191481 |
| 3modern | 586 | Steffy, Adam (1498) | Won 2-0 | +181499 |
| 4modern | 648 | Kauffman, Brandon (1514) | Lost 1-2 | -181481 |
| 5modern | 599 | Lee, Matthew S. (1475) | Lost 0-2 | -181463 |
| average opponent: 1484record: 2-3 | new rating: 1463 | |||
| Grand Prix Atlantic City 2015 (DTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 280 | Ong, Alvin (1461) | Won 2-1 | +171517 |
| 2sealed | 131 | Guarino, Michael (1518) | Lost 0-2 | -181499 |
| 3sealed | 452 | Greaves, Raymond (1484) | Lost 0-2 | -181481 |
| average opponent: 1488record: 1-2 | new rating: 1481 | |||