McMahan, Josh
Current rating: 1430
Record: 1-5-1
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 418 | Fichtel, Matthew (1464) | Lost 0-2 | -181446 |
| 2modern | 513 | Paul, Jordon (1479) | Draw 1-1 | +11447 |
| 3modern | 524 | Andres, Jake (1480) | Lost 0-0 | -171430 |
| average opponent: 1474record: 0-2-1 | new rating: 1430 | |||
| Grand Prix Oklahoma City 2013 (THS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 370 | Mermin, Jeff (1481) | Lost 0-2 | -181482 |
| 2sealed | 359 | Allen, Jason (1521) | Lost 0-2 | -181464 |
| 3sealed | 558 | Oliver, Tracy (1467) | Won 2-0 | +181482 |
| 4sealed | 502 | Wynn, Emily (1481) | Lost 0-2 | -181464 |
| average opponent: 1488record: 1-3 | new rating: 1464 | |||