O'Neill, Matthew
Current rating: 1456
Record: 5-8
| Grand Prix Pittsburgh 2018 (DOM standard) | starting rating: 1492 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 251 | Jacobino, Joshua (1500) | Lost 0-2 | -181474 |
| 2standard | 195 | Reskovac, Randall (1482) | Lost 1-2 | -181456 |
| 3standard | 420 | Lloyd, Kevin (1425) | Lost 1-2 | -181438 |
| 4standard | 443 | Moran, Brogan (1445) | Won 2-0 | +181456 |
| 5standard | 404 | Phillips, Tyler (1463) | Won 2-0 | +181474 |
| 6standard | 330 | Bovenzi, Nicholas (1483) | Lost 0-2 | -181456 |
| average opponent: 1466record: 2-4 | new rating: 1456 | |||
| Grand Prix Pittsburgh 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 19 | Keesler, Matt (1553) | Won 2-1 | +191519 |
| 2standard | 26 | Larry, Brandon (1635) | Lost 1-2 | -161503 |
| 3standard | 363 | Bowker, Keith (1496) | Won 2-0 | +181521 |
| 4standard | 277 | Raffensberger, Michael (1483) | Lost 0-2 | -191502 |
| 5standard | 373 | Tuchek, Stephen (1692) | Lost 1-2 | -141488 |
| 6standard | 528 | Murchison, Adrian (1527) | Won 2-0 | +181506 |
| 7standard | 469 | McLaughlin, Morgan (1697) | Lost 1-2 | -141492 |
| average opponent: 1583record: 3-4 | new rating: 1492 | |||