O'Connor, Sean
Current rating: 1451
Record: 13-17-2
| Grand Prix Seattle 2018 (legacy) (legacy) | starting rating: 1452 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 334 | Young, Jacob (1574) | Won 2-1 | +211473 |
| 3legacy | 124 | Yurchick, Adam (1747) | Lost 0-2 | -141459 |
| 4legacy | 424 | Semeyn, Jonathan (1657) | Won 2-0 | +221481 |
| 5legacy | 233 | Ratchford, Cody (1670) | Lost 1-2 | -151466 |
| 6legacy | 341 | Petter, Dylan (1467) | Lost 1-2 | -181448 |
| 7legacy | 388 | Simpson, Jeffrey (1570) | Lost 0-2 | -151433 |
| 8legacy | 368 | Seto, Ivan (1434) | Won 2-1 | +181451 |
| top | average opponent: 1589record: 3-4 | new rating: 1451 | ||
| Grand Prix Atlanta 2011 (extended) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 99 | Perlin, Leonid (1500) | Draw 1-1 | +11470 |
| 2extended | 140 | Nussbaum, Joshua W (1481) | Won 2-0 | +181488 |
| 3extended | 95 | Branum, Jared (1516) | Draw 1-1 | +11489 |
| 4extended | 192 | Kanies, Andrew (1522) | Lost 0-2 | -181471 |
| 5extended | 228 | Anderson, Zachary (1481) | Won 2-0 | +191490 |
| 6extended | 182 | Scheier, Garrett C (1416) | Lost 1-2 | -201470 |
| 7extended | 161 | Hoffman, Ryan (1480) | Lost 0-1 | -181452 |
| top | average opponent: 1485record: 2-3-2 | new rating: 1452 | ||
| Grand Prix Nashville 2010 (SOM limited) | starting rating: 1525 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 2 | Butzin, David (1500) | Lost 0-2 | -191506 |
| 2sealed | 241 | King, Mason (1482) | Lost 0-2 | -181488 |
| 3sealed | 310 | Garron, Daniel (1463) | Lost 1-2 | -191469 |
| top | average opponent: 1482record: 0-3 | new rating: 1469 | ||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 175 | Girard, Adam (1500) | Won 2-0 | +181503 |
| 2standard | 144 | Tibung, Marlon Jay (1528) | Won 2-1 | +191522 |
| 3standard | 63 | Cavenaugh, Justin (1519) | Lost 1-2 | -181504 |
| 4standard | 206 | Gemme, Mike (1483) | Won 2-0 | +171521 |
| 5standard | 140 | York, Steve (1541) | Won 2-1 | +191540 |
| 6standard | 114 | Sachlas, Peter (1554) | Won 2-1 | +181558 |
| 7standard | 66 | McKeown, Sean (1697) | Lost 0-2 | -151543 |
| 8standard | 102 | Keiser, Eric A (1554) | Lost 0-2 | -181525 |
| top | average opponent: 1547record: 5-3 | new rating: 1525 | ||
| Grand Prix Tampa 2009 (ZEN limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 123 | Holland, Megan (1532) | Lost 0-2 | -171483 |
| 2sealed | 272 | Bond, Matthew (1482) | Lost 1-2 | -181465 |
| 3sealed | 317 | Reschke, John D (1466) | Lost 0-2 | -181447 |
| 5sealed | 324 | Burt, Anthony (1464) | Won 2-0 | +181465 |
| 6sealed | 273 | Music, Patrick (1483) | Won 2-0 | +181483 |
| 7sealed | 207 | Magby, Mike (1596) | Won 2-0 | +201503 |
| 8sealed | 134 | Cuevas, Jose R (1498) | Lost 0-2 | -181485 |
| top | average opponent: 1503record: 3-4 | new rating: 1485 | ||