O'Shea, Andrew
Current rating: 1526
Record: 23-22-1
| Grand Prix Toronto 2019 (modern) | starting rating: 1613 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 7 | Renault, Austen (1507) | Lost 1-2 | -201593 |
| 2modern | 473 | Forget, Alexandre (1448) | Lost 1-2 | -201573 |
| 3modern | 617 | Sterry, Benjamin (1382) | Lost 1-2 | -221551 |
| 4modern | 610 | Dojcsak, Mike (1524) | Won 2-0 | +181569 |
| 5modern | 503 | MacLeod, Michael (1467) | Won 2-1 | +161585 |
| 6modern | 388 | Pasin, Stefano (1424) | Lost 0-2 | -211564 |
| 7modern | 354 | Parker, Matthew 638 (1551) | Lost 0-2 | -181546 |
| 8modern | 313 | Welch, Jordan (1449) | Lost 1-2 | -201526 |
| top | average opponent: 1469record: 2-6 | new rating: 1526 | ||
| Grand Prix Atlanta 2018 (modern) | starting rating: 1558 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 204 | Orcutt, Jonathan (1500) | Won 2-0 | +171575 |
| 2modern | 2 | Joyall, Vincent (1470) | Won 2-1 | +161591 |
| 3modern | 148 | Muller, Paul (1638) | Won 2-1 | +191610 |
| 4modern | 109 | Webber, Chad (1424) | Lost 0-2 | -221588 |
| 5modern | 145 | Buntele, Michael (1517) | Won 2-1 | +171605 |
| 6modern | 111 | Feeney, Luke (1843) | Lost 1-2 | -141591 |
| 7modern | 234 | Findlay, Bill (1567) | Won 2-0 | +181609 |
| 8modern | 180 | Mowrey, Austin (1894) | Won 2-0 | +231632 |
| 10modern | 59 | Flaczinski, Jake (1696) | Lost 0-2 | -171615 |
| 11modern | 90 | Benson, Robert (1522) | Won 2-0 | +161631 |
| 12modern | 86 | Cummings, John (1588) | Lost 0-2 | -191612 |
| 13modern | 77 | Taxi Beng, Ong Shu Liang (1554) | Won 2-1 | +171629 |
| 14modern | 86 | Russell, Griffin (1788) | Lost 1-2 | -151614 |
| 15modern | 99 | Trompeter, Daniel (1563) | Draw 1-1 | -11613 |
| top | average opponent: 1612record: 8-5-1 | new rating: 1613 | ||
| Grand Prix Hartford 2018 (modern) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 337 | Dalton, Richard (1500) | Won 2-1 | +181506 |
| 2modern | 90 | Williams, Craig (1488) | Won 2-0 | +171523 |
| 3modern | 267 | Benson, Jonathan (1985) | Won 2-1 | +261549 |
| 4modern | 33 | Jones, Ben (1703) | Won 2-1 | +211570 |
| 5modern | 60 | Klomparens, Jadine (1665) | Lost 0-2 | -161554 |
| 6modern | 232 | Stitson, Christopher (1713) | Won 2-1 | +211575 |
| 7modern | 113 | Gavigan, Cody (1575) | Lost 0-2 | -181557 |
| 8modern | 247 | Potter, Ryan (1539) | Won 2-0 | +171574 |
| 9modern | 360 | Mendez, Paul (1540) | Won 2-0 | +181592 |
| 10modern | 241 | Gellis, Dylan (1623) | Lost 0-2 | -181574 |
| 11modern | 295 | Madsen, Timothy (1644) | Lost 0-2 | -161558 |
| top | average opponent: 1634record: 7-4 | new rating: 1558 | ||
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 1112 | Teplitski, Daniel (1517) | Won 2-1 | +191483 |
| 2modern | 770 | O'Sullivan, Jeff (1500) | Lost 0-2 | -171466 |
| 3modern | 1071 | Packard, Nicholas (1500) | Won 2-0 | +181484 |
| 4modern | 1007 | Buchanan, Nathan (1608) | Won 2-1 | +211505 |
| 5modern | 839 | O'Reilly, John (1520) | Won 2-0 | +181523 |
| 6modern | 791 | Riker, Thomas (1524) | Lost 0-2 | -181505 |
| 7modern | 862 | Kuhn, Kory (1543) | Lost 1-2 | -171488 |
| top | average opponent: 1530record: 4-3 | new rating: 1488 | ||
| Grand Prix Boston-Worcester 2012 (M13 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 418 | James, Deondre (1500) | Lost 0-2 | -181482 |
| 2sealed | 621 | Simpson, Curtis (1481) | Won 2-0 | +181500 |
| 3sealed | 628 | Cook, Chris (1500) | Won 2-1 | +181518 |
| 4sealed | 490 | Bonanni, Lisa (1522) | Lost 1-2 | -181500 |
| 5sealed | 507 | Hayes, Ryan D (1522) | Lost 1-2 | -181482 |
| 6sealed | 548 | McPiledriver, Brewcie (1482) | Lost 1-2 | -181464 |
| top | average opponent: 1501record: 2-4 | new rating: 1464 | ||