O'Neill, Michael
Current rating: 1453
| Grand Prix Phoenix 2020 (pioneer) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 71 | Ryan, Neil (1500) | Lost 0-2 | -181471 |
| 2pioneer | 266 | Ragusa, Joshua (1462) | Lost 0-2 | -181453 |
| top | average opponent: 1481record: 0-2 | new rating: 1453 | ||
| Grand Prix Las Vegas 2019 (modern) (modern) | starting rating: 1519 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 485 | Hundemer, Greg (1495) | Won 2-1 | +171536 |
| 2modern | 87 | Pauloff, Nicholas (1875) | Lost 0-2 | -121524 |
| 3modern | 471 | Wysocki, Michael (1503) | Lost 1-2 | -181506 |
| 4modern | 605 | Crowfoot, Corey (1572) | Lost 1-2 | -171489 |
| top | average opponent: 1611record: 1-3 | new rating: 1489 | ||
| Grand Prix New Jersey 2014 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 716 | Silva, Matt (1429) | Lost 1-2 | -191481 |
| 2legacy | 1090 | Fuller, Josh (1476) | Lost 0-2 | -181463 |
| 3legacy | 1336 | Hartnett, James (1491) | Won 2-0 | +181481 |
| 4legacy | 1266 | Hubbard, Richard (1477) | Won 2-1 | +181499 |
| 5legacy | 1005 | Bevenour, Matthew (1594) | Won 2-1 | +201519 |
| 6legacy | 837 | Castaneda, Christian (1523) | Won 2-0 | +181537 |
| 7legacy | 711 | Moran, Kyle (1535) | Lost 1-2 | -181519 |
| top | average opponent: 1503record: 4-3 | new rating: 1519 | ||