O'Brien, Cody
Current rating: 1562
Record: 34-33-3
| Grand Prix Denver 2019 (M20 standard) | starting rating: 1561 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 61 | Elliott, Jeffrey (1611) | Won 2-1 | +191580 |
| 3standard | 99 | Kwiatkowski, Mark (1489) | Lost 0-2 | -201560 |
| 4standard | 83 | Sommerville, Steve (1526) | Lost 0-2 | -191541 |
| 5standard | 212 | Andersen, Trevor (1502) | Lost 0-2 | -181523 |
| 6standard | 208 | Moore, John (1588) | Won 2-0 | +191542 |
| 7standard | 169 | Parks, Kale (1687) | Won 2-0 | +201562 |
| 8standard | 125 | Sublett, James (1512) | Draw 1-1 | 01562 |
| top | average opponent: 1559record: 3-3-1 | new rating: 1562 | ||
| Grand Prix Dallas-Fort Worth 2019 (modern) | starting rating: 1548 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 238 | Adame, Alfonso (1476) | Won 2-0 | +171565 |
| 3modern | 225 | Hynek, David (1518) | Lost 1-2 | -191546 |
| 4modern | 311 | Dunn, Chris (1530) | Won 2-0 | +171563 |
| 5modern | 230 | Olive, Richard (1537) | Lost 1-2 | -181545 |
| 6modern | 239 | Bowlin, Caleb (1552) | Won 2-0 | +181563 |
| 7modern | 184 | Lopes, Andres (1503) | Won 2-0 | +171580 |
| 8modern | 61 | Cook, Anthony (1508) | Lost 1-2 | -191561 |
| top | average opponent: 1518record: 4-3 | new rating: 1561 | ||
| Grand Prix Kansas City 2019 (WAR standard) | starting rating: 1502 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 51 | Glonek, Daniel (1518) | Lost 1-2 | -171485 |
| 3standard | 310 | Rehn, EJ (1497) | Won 2-1 | +181503 |
| 4standard | 135 | Wilson, Jacob [USA] (1569) | Lost 0-0 | -171486 |
| 5standard | 282 | Kettner, Evin (1500) | Won 2-1 | +181504 |
| 6standard | 131 | Rude, Stephen (1433) | Won 2-1 | +171521 |
| 7standard | 163 | Webb, Nick (1539) | Won 2-0 | +181539 |
| 8standard | 104 | Bedel, K.c. (1498) | Won 2-1 | +181557 |
| 9standard | 62 | Collins, Austin (1769) | Lost 1-2 | -151542 |
| 10standard | 50 | Wallace, Jacob (1557) | Won 2-0 | +191561 |
| 11standard | 44 | Segal, Jacob (1582) | Lost 1-2 | -181543 |
| 12standard | 64 | Medley, Jacob (1712) | Won 2-0 | +211564 |
| 13standard | 40 | Maloney, Kyle (1624) | Lost 1-2 | -171547 |
| 14standard | 47 | Blanchard, David (1496) | Won 2-1 | +171564 |
| 15standard | 49 | Freeman, Kevin (1656) | Lost 1-2 | -161548 |
| top | average opponent: 1568record: 8-6 | new rating: 1548 | ||
| Grand Prix Oklahoma City 2017 (modern) | starting rating: 1537 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 33 | Stevenson, James (1722) | Won 2-1 | +211558 |
| 3modern | 72 | Perigo, Nathanael (1623) | Lost 0-2 | -171541 |
| 4modern | 278 | Allen, Willow (1519) | Lost 1-2 | -181523 |
| 5modern | 325 | Slater, Eric (1481) | Lost 0-2 | -191504 |
| 6modern | 444 | Ripper, Tommy (1481) | Won 2-0 | +181522 |
| 7modern | 336 | Davis, Seth (1449) | Lost 1-2 | -201502 |
| top | average opponent: 1546record: 2-4 | new rating: 1502 | ||
| Grand Prix Las Vegas 2017 (modern) (modern) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 391 | Fong, Devin (1518) | Won 2-1 | +181535 |
| 3modern | 61 | Long, Paul (1453) | Lost 1-2 | -201515 |
| 4modern | 801 | Porter, Michael (1534) | Lost 1-2 | -171498 |
| 5modern | 1115 | Teran, Cory (1606) | Won 2-0 | +201518 |
| 6modern | 543 | Espada, Isaac (1525) | Draw 1-1 | 01518 |
| 7modern | 699 | Johnson, Eric (1502) | Won 2-1 | +171535 |
| 8modern | 491 | Lee, Farand (1649) | Lost 1-2 | -161519 |
| 9modern | 629 | Cheung, Eric (1478) | Won 2-0 | +181537 |
| top | average opponent: 1533record: 4-3-1 | new rating: 1537 | ||
| Grand Prix Las Vegas 2017 (legacy) (legacy) | starting rating: 1526 | |||
| round | table | opponent (rating) | result | Δrating |
| 2legacy | 273 | Satcher, Austin (1489) | Won 2-1 | +181544 |
| 3legacy | 374 | Zaczek, Jonathon (1978) | Lost 1-2 | -111533 |
| 4legacy | 692 | Pecora, Gerald (1541) | Won 2-0 | +181551 |
| 5legacy | 552 | Dubyk, Dilon (1583) | Lost 0-2 | -171534 |
| 6legacy | 736 | Szabo, Matthew (1585) | Lost 0-2 | -171517 |
| top | average opponent: 1635record: 2-3 | new rating: 1517 | ||
| Grand Prix Dallas-Fort Worth 2016 (modern) | starting rating: 1476 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 135 | Nance, Joshua (1458) | Won 2-0 | +171493 |
| 2modern | 338 | Du, Kevin (1593) | Lost 0-2 | -161477 |
| 3modern | 676 | John, Julian (1503) | Won 2-1 | +191496 |
| 4modern | 226 | Gentillet, Jerome (1756) | Won 2-0 | +221518 |
| 5modern | 168 | Malone, Miles (1508) | Lost 1-2 | -181500 |
| 6modern | 522 | Orange, Gregory (1866) | Won 2-1 | +241524 |
| 7modern | 328 | Kageler, Aydin (1535) | Lost 1-2 | -171507 |
| 8modern | 518 | Hale, Brian (1549) | Draw 1-1 | 01507 |
| 9modern | 410 | Moreno, Raine (1556) | Won 2-0 | +191526 |
| top | average opponent: 1592record: 5-3-1 | new rating: 1526 | ||
| Grand Prix Indianapolis 2016 (modern) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 579 | Baldeo, Jonathan (1482) | Lost 1-2 | -181464 |
| 2modern | 564 | Roth, Bryan (1482) | Won 2-1 | +181482 |
| 3modern | 488 | Patton, Dustin (1515) | Won 2-1 | +191501 |
| 4modern | 405 | Donegan, Dylan (1874) | Lost 1-2 | -121489 |
| 5modern | 468 | Moore, Jonathan (1463) | Won 2-0 | +181507 |
| 6modern | 363 | Catardi, Joey (1632) | Lost 1-2 | -161491 |
| 7modern | 588 | Ioanis, Dillon (1638) | Lost 1-2 | -151476 |
| top | average opponent: 1584record: 3-4 | new rating: 1476 | ||
| Grand Prix Charlotte 2016 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 461 | Cameresi, Aaron (1500) | Lost 1-2 | -181482 |
| 2modern | 725 | Martin, Kevin [USA] (1480) | Won 2-0 | +181500 |
| 3modern | 778 | Jorn, Tejan (1481) | Won 2-1 | +181518 |
| 4modern | 899 | Castellano, Austen (1481) | Lost 1-2 | -191499 |
| 5modern | 675 | Beavers, Conner (1499) | Won 2-0 | +181517 |
| 6modern | 709 | Norsworthy, Jeremy (1532) | Lost 1-2 | -181499 |
| 7modern | 509 | Beavers, John (1523) | Lost 0-2 | -171482 |
| top | average opponent: 1499record: 3-4 | new rating: 1482 | ||