O'Hara, Ron
Current rating: 1568
Record: 15-13
| Grand Prix Las Vegas 2013 (MMA limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 1598 | Yap, Ethan (1500) | Won 2-0 | +181536 |
| 2sealed | 1594 | Vanbragt, Erik (1517) | Won 2-1 | +171553 |
| 3sealed | 1682 | Pinto, Antonio (1562) | Won 2-0 | +191572 |
| 4sealed | 1382 | Smith, Brian (1620) | Won 2-0 | +181590 |
| 5sealed | 1150 | Prost, Andrejs (1949) | Lost 0-2 | -111579 |
| 6sealed | 1005 | Davis, Nathaniel (1553) | Lost 1-2 | -191560 |
| 7sealed | 759 | Dao, Phu (1834) | Won 2-0 | +231583 |
| 8sealed | 595 | Kubouchi, Naoki (1765) | Lost 0-2 | -151568 |
| top | average opponent: 1662record: 5-3 | new rating: 1568 | ||
| Grand Prix San Diego 2011 (ISD limited) | starting rating: 1542 | |||
| round | table | opponent (rating) | result | Δrating |
| 4sealed | 473 | Coqueiro, Rafael S (1660) | Won 2-0 | +201562 |
| 5sealed | 428 | Brumby, Gene (1813) | Lost 0-2 | -131549 |
| 6sealed | 428 | Muir, Jeremy (1682) | Lost 1-2 | -161533 |
| 7sealed | 457 | Warmbrand, Casey (1520) | Won 2-0 | +181551 |
| 8sealed | 461 | Zhang, Meng Qiu (1749) | Lost 1-2 | -151536 |
| 9sealed | 463 | Froehlig, Timothy (1515) | Lost 0-2 | -181518 |
| top | average opponent: 1656record: 2-4 | new rating: 1518 | ||
| Grand Prix Denver 2011 (MBS limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 401 | Ekstrand, Matthew B (1625) | Won 2-0 | +201538 |
| 4sealed | 406 | Bau, Philip (1709) | Lost 0-2 | -151523 |
| 5sealed | 489 | Berni, Roberto (1667) | Won 2-0 | +211544 |
| 6sealed | 434 | DeLazier, Jay (1544) | Lost 0-2 | -181526 |
| 7sealed | 441 | Yelton, Ed (1488) | Won 2-0 | +171543 |
| 8sealed | 450 | Renuard, Todd (1511) | Lost 1-2 | -181525 |
| 9sealed | 453 | Matthaei, Matthew (1492) | Won 2-0 | +171542 |
| top | average opponent: 1576record: 4-3 | new rating: 1542 | ||
| Grand Prix Oakland 2010 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 134 | Oakes, Connor (1493) | Won 2-1 | +181518 |
| 2extended | 180 | McLaren, Dean (1500) | Lost 0-2 | -181500 |
| 3extended | 234 | Petitt, Narayana (1500) | Won 2-0 | +181518 |
| 4extended | 226 | Capone, Enzo (1516) | Won 2-0 | +181536 |
| 5extended | 123 | Gazard-Maurel, Herve (1514) | Won 2-0 | +171553 |
| 6extended | 91 | Neufeld, Caleb I (1510) | Lost 0-2 | -191534 |
| 7extended | 155 | Kludka, Petr (1643) | Lost 0-2 | -161518 |
| top | average opponent: 1525record: 4-3 | new rating: 1518 | ||