O'Hara, Michael J
Current rating: 1337
Record: 2-12
| Grand Prix Oakland 2010 (extended) | starting rating: 1393 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 193 | Fernald, James A (1566) | Lost 1-2 | -151378 |
| 2extended | 235 | Moore, Avery B (1482) | Lost 0-2 | -161362 |
| 3extended | 292 | Showers, Gabriel L (1463) | Lost 0-2 | -161346 |
| 4extended | 354 | Colwell, Jack (1489) | Won 2-1 | +201366 |
| 5extended | 310 | Zhu, Hui (1463) | Won 2-1 | +201386 |
| 6extended | 264 | Reeves, Dusty (1484) | Lost 1-2 | -161370 |
| 7extended | 221 | Hack, Jimmy (1464) | Lost 0-2 | -171353 |
| 8extended | 173 | Yamaguchi, Brandon (1448) | Lost 1-2 | -161337 |
| average opponent: 1482record: 2-6 | new rating: 1337 | |||
| Grand Prix Columbus 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 58 | McMillan, W Ziggy (1500) | Lost 0-2 | -181482 |
| 2sealed | 243 | Beckage, Eric (1482) | Lost 0-2 | -181464 |
| 3sealed | 363 | Bailey, Paul (1464) | Lost 0-2 | -181446 |
| 4sealed | 372 | Erla, Bradley (1445) | Lost 0-2 | -181428 |
| 5sealed | 319 | Weisenberger, Richard (1428) | Lost 0-2 | -181410 |
| 6sealed | 265 | Witherell, Randal (1446) | Lost 0-2 | -171393 |
| average opponent: 1461record: 0-6 | new rating: 1393 | |||