O'Sullivan, Connor
Current rating: 1648
Record: 42-35
| Regional Championships Atlanta 2023 (pioneer) | starting rating: 1639 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 110 | Ballew, Trey (1396) | Won 2-1 | +141653 |
| 2pioneer | 38 | Connor, Johnny (1607) | Won 2-0 | +171670 |
| 3pioneer | 155 | Rodriguez, Beni (1537) | Lost 1-2 | -211649 |
| 4pioneer | 200 | Robinson, Toph (1705) | Lost 1-2 | -171632 |
| 5pioneer | 345 | Peters, Oliver [USA] (1512) | Won 2-0 | +161648 |
| 6pioneer | 164 | Becerra Reyes, Daniel (1819) | Lost 1-2 | -151633 |
| 7pioneer | 242 | Coronado, Andrew (1537) | Won 2-1 | +171650 |
| 8pioneer | 280 | Magno, Miguel (1618) | Won 2-0 | +171667 |
| 9pioneer | 121 | Serano, Josh (1611) | Lost 1-2 | -191648 |
| top | average opponent: 1594record: 5-4 | new rating: 1648 | ||
| Regional Championships Dallas 2023 (pioneer) | starting rating: 1647 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 92 | Segura, Jacob (1655) | Lost 1-2 | -181629 |
| 2pioneer | 319 | Hubbard, Alan (1621) | Lost 1-2 | -181611 |
| 3pioneer | 508 | Gibson, Gaige (1518) | Won 2-0 | +161627 |
| 4pioneer | 453 | Saltsman, David (1580) | Won 2-1 | +171644 |
| 5pioneer | 226 | Gomez, Ryan (1501) | Won 2-1 | +161660 |
| 6pioneer | 154 | Alberico, Cassady (1536) | Won 2-1 | +151675 |
| 7pioneer | 78 | Milton, Dan (1554) | Lost 1-2 | -201655 |
| 8pioneer | 141 | Weihe, Sean (1755) | Lost 0-2 | -161639 |
| top | average opponent: 1590record: 4-4 | new rating: 1639 | ||
| Regional Championships San Diego 2023 (ONE standard) | starting rating: 1670 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 383 | Knapp, Grayson (1599) | Lost 1-2 | -191651 |
| 2standard | 305 | Johnson, Brendon (1865) | Won 2-1 | +211672 |
| 3standard | 227 | Walsh, Steve (1659) | Lost 1-2 | -181654 |
| 4standard | 256 | Denney, Jonathan (1684) | Lost 0-2 | -171637 |
| 5standard | 400 | Riederman, Zoe (1470) | Lost 1-2 | -211616 |
| 6standard | 377 | Andrade Jr., Kevin (1448) | Won 2-0 | +151631 |
| 7standard | 304 | Barajas, Gilbert (1526) | Won 2-0 | +161647 |
| top | average opponent: 1607record: 3-4 | new rating: 1647 | ||
| Grand Prix Houston 2018 (RIX limited) | starting rating: 1675 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 166 | Cappa, Robert (1516) | Lost 0-2 | -211654 |
| 3sealed | 208 | Holliday, John (1855) | Lost 0-2 | -141640 |
| 4sealed | 359 | Mendenhall, Devin (1487) | Won 2-0 | +151655 |
| 5sealed | 254 | Ramos, Ismael (1573) | Won 2-0 | +171672 |
| 6sealed | 137 | Hochman, Sabrina (1458) | Won 2-0 | +141686 |
| 7sealed | 124 | McCord, Kristopher (1795) | Lost 1-2 | -161670 |
| top | average opponent: 1614record: 3-3 | new rating: 1670 | ||
| Grand Prix New Jersey 2017 (lim) (XLN limited) | starting rating: 1628 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 210 | Williams, Andrew (1472) | Won 2-0 | +151643 |
| 3sealed | 45 | Eberhardt, Thomas J. (1535) | Won 2-0 | +161659 |
| 4sealed | 63 | Wong, Matthew (1697) | Won 2-0 | +191678 |
| 5sealed | 47 | Stadtfeld, Matthias (1577) | Won 2-0 | +161694 |
| 6sealed | 29 | Taylor, Joshua (1811) | Lost 0-2 | -161678 |
| 7sealed | 100 | Claudel, Slater (1834) | Won 2-0 | +211699 |
| 8sealed | 43 | Stark, Ben S (2186) | Won 2-0 | +261725 |
| 9sealed | 11 | Massak, Shawn (1695) | Lost 0-2 | -191706 |
| 10draft | 9 | Johnson, Brendon (1780) | Lost 1-2 | -161690 |
| 11draft | 9 | Haversat, Jacob (1861) | Lost 1-2 | -151675 |
| 12draft | 9 | Snyder, Derek (1704) | Lost 1-2 | -181657 |
| 13draft | 94 | Williams, Justin (1683) | Won 2-0 | +191676 |
| 14draft | 87 | DiIorio, Dan (1578) | Lost 0-2 | -201656 |
| 15draft | 73 | Chen, Tzu-Mainn (1724) | Won 2-1 | +191675 |
| top | average opponent: 1724record: 8-6 | new rating: 1675 | ||
| Grand Prix New Jersey 2017 (std) (AER standard) | starting rating: 1507 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 187 | Amor, Martin Miguel (1546) | Lost 0-2 | -181489 |
| 2standard | 122 | Copple, Dylan (1429) | Won 2-0 | +171506 |
| 3standard | 406 | Tabares, Brian (1514) | Won 2-0 | +181524 |
| 4standard | 303 | Lepore, Frank (1877) | Won 2-1 | +251549 |
| 5standard | 166 | Babcock, Grant (1604) | Won 2-1 | +191568 |
| 6standard | 58 | Beatty, Robert (1923) | Won 2-1 | +241592 |
| 7standard | 62 | Moore, William (1563) | Won 2-0 | +171609 |
| 8standard | 22 | Stark, Ben S (2056) | Lost 0-2 | -101599 |
| 9standard | 80 | West, Matthew (1591) | Won 2-1 | +181617 |
| 10standard | 44 | LaRocque, Justin (1609) | Won 2-0 | +181635 |
| 11standard | 43 | De Jesus, Johnnery (1721) | Won 2-1 | +191654 |
| 12standard | 20 | Tiu, Oliver (2224) | Lost 1-2 | -81646 |
| 13standard | 58 | Cooper, Russell (1705) | Lost 0-2 | -171629 |
| 14standard | 70 | Deerwester, Isaac (1596) | Lost 0-2 | -191610 |
| 15standard | 93 | Clute, Austin (1583) | Won 2-0 | +181628 |
| top | average opponent: 1703record: 10-5 | new rating: 1628 | ||
| Grand Prix Providence 2016 (KLD standard) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 321 | Paine, Dan (1497) | Lost 0-2 | -181470 |
| 2standard | 323 | Spencer, David (1429) | Won 2-1 | +181488 |
| 3standard | 396 | Gray, David (1410) | Won 2-1 | +161504 |
| 4standard | 364 | Cameron, Grady (1406) | Lost 1-2 | -201484 |
| 5standard | 386 | Bink, Adam (1507) | Won 2-0 | +191503 |
| 6standard | 246 | Marmulstein, Rion (1758) | Lost 1-2 | -141489 |
| 7standard | 367 | Keeney, Steffan (1485) | Won 2-1 | +181507 |
| 8standard | 261 | Ferguson, Michael (1534) | Won 2-0 | +191526 |
| 9standard | 224 | Jacques, Zachary (1472) | Lost 0-2 | -191507 |
| top | average opponent: 1500record: 5-4 | new rating: 1507 | ||
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 273 | Romano, Nicholas (1518) | Won 2-0 | +191485 |
| 3modern | 44 | Cerqueira, Bruno (1499) | Won 2-1 | +181503 |
| 4modern | 64 | Holmes, Evan (1538) | Won 2-0 | +191522 |
| 5modern | 26 | Reynolds, Patrick (1567) | Lost 0-2 | -171505 |
| 6modern | 128 | Williams, Mike (1534) | Lost 0-2 | -181487 |
| 7modern | 213 | Schmollinger, Randall (1505) | Won 2-1 | +191506 |
| 8modern | 168 | Dacunto, Robert (1534) | Lost 0-2 | -181488 |
| top | average opponent: 1528record: 4-3 | new rating: 1488 | ||
| Grand Prix Philadelphia 2014 (BNG limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 17 | Hein, Christopher (1617) | Lost 0-2 | -161484 |
| 2sealed | 517 | Zung, Stacy (1481) | Lost 0-2 | -181466 |
| top | average opponent: 1549record: 0-2 | new rating: 1466 | ||