O'Brien, Daniel
Current rating: 1455
Record: 7-11-1 (GP) / 5-6 (professional)
| Grand Prix Boston 2005 (extended) | starting rating: 1429 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 208 | Garcia, Oscar [USA] (1500) | Won 2-0 | +191448 |
| 2extended | 19 | Polanik, Kimball (1537) | Draw 1-1 | +21450 |
| 3extended | 122 | Flaum, Adam (1541) | Lost 1-2 | -171433 |
| 4extended | 224 | Auvinen, Gunnari (1500) | Won 2-0 | +201453 |
| 5extended | 155 | Marchesano, Ernie (1529) | Won 2-1 | +191472 |
| 6extended | 90 | Sanguinetti, James (1497) | Lost 1-2 | -171455 |
| top | average opponent: 1517record: 3-2-1 | new rating: 1455 | ||
| Pro Tour Houston 2002 (extended) | starting rating: 1454 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 67 | Wolf, Andrew (1727) | Lost 0-2 | -131441 |
| 2extended | 150 | Bright, Jeremy (1482) | Lost 1-2 | -171424 |
| 3extended | 146 | Parnell, Taylor (1497) | Won 2-1 | +191443 |
| 4extended | 109 | Stevenson, Craig (1645) | Lost 1-2 | -141429 |
| top | average opponent: 1588record: 1-3 | new rating: 1429 | ||
| Grand Prix Philadelphia 2002 (ONS rochester) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 17 | Cash, Jeremy (1524) | Lost 0-2 | -181471 |
| 5sealed | 126 | Gregg, Tony E (1537) | Lost 1-2 | -171454 |
| top | average opponent: 1531record: 0-2 | new rating: 1454 | ||
| Grand Prix Milwaukee 2002 (TOR standard) | starting rating: 1506 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 98 | McDonough, Anthony (1384) | Lost 0-2 | -211485 |
| 4standard | 205 | Lewis, Sam (1581) | Lost 1-2 | -161469 |
| 5standard | 213 | Benson, Alex (1501) | Won 2-1 | +191488 |
| 6standard | 156 | salerno, shane (1518) | Won 2-0 | +181506 |
| 7standard | 100 | Moret, Jef (1525) | Lost 0-2 | -171489 |
| top | average opponent: 1502record: 2-3 | new rating: 1489 | ||
| Pro Tour Osaka 2002 (Odyssey block) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 5 | Horemans, Michiel (1545) | Won 2-0 | +201486 |
| 2block | 66 | Pechon, Jonathan (1749) | Won 2-1 | +231509 |
| 3block | 25 | Gemund, Tobias (1545) | Lost 1-2 | -181491 |
| 4block | 24 | Mowshowitz, Zvi (1870) | Lost 0-2 | -111480 |
| 5block | 76 | Anderson, Kaare (1686) | Won 2-0 | +221502 |
| 6block | 38 | Anan, Go (1544) | Lost 1-2 | -181484 |
| 7block | 72 | Braun, Oliver (1661) | Won 2-1 | +221506 |
| top | average opponent: 1657record: 4-3 | new rating: 1506 | ||
| Grand Prix Montreal 2001 (ODY limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 41 | Herkner, Chris (1525) | Lost 1-2 | -171447 |
| 2sealed | 69 | Favreau, Gregory (1446) | Won 2-0 | +181465 |
| 3sealed | 72 | savaria, nicolas (1500) | Won 2-0 | +191484 |
| 4sealed | 68 | Pollock, Elijah (1524) | Lost 1-2 | -181466 |
| top | average opponent: 1499record: 2-2 | new rating: 1466 | ||
| Grand Prix Boston 2001 (PLS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 4 | Cannistraro, Michael (1500) | Lost 1-2 | -181482 |
| 2sealed | 163 | Trombley, Vincent (1481) | Lost 1-2 | -181464 |
| top | average opponent: 1491record: 0-2 | new rating: 1464 | ||