O'Brien, Thomas
Current rating: 1480
Record: 5-6
| Grand Prix Detroit 2005 (BOK limited) | starting rating: 1499 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 99 | Ketita, Nassim (1500) | Lost 0-2 | -181481 |
| 2sealed | 187 | Walls, Gary (1482) | Won 2-0 | +181499 |
| 3sealed | 126 | Chambers, Adam (1452) | Won 2-1 | +171516 |
| 4sealed | 123 | Gillham, Jacob (1553) | Lost 0-2 | -171499 |
| 5sealed | 145 | Wood, Thomas (1468) | Won 2-0 | +171516 |
| 6sealed | 122 | Fellows, Leon (1522) | Lost 1-2 | -181498 |
| 7sealed | 110 | Germar, Richard (1501) | Lost 0-2 | -181480 |
| average opponent: 1497record: 3-4 | new rating: 1480 | |||
| Grand Prix Columbus 2004 (DST limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 145 | Minniear, Adam (1485) | Lost 0-2 | -181482 |
| 2sealed | 233 | Burns, Christopher (1483) | Won 2-0 | +181500 |
| 3sealed | 209 | Gerbic, Marcus (1449) | Won 2-0 | +171517 |
| 4sealed | 125 | Mantey, Tyler (1518) | Lost 0-2 | -181499 |
| average opponent: 1484record: 2-2 | new rating: 1499 | |||