Harmon, John
Current rating: 1348
Record: 1-10
| Grand Prix Las Vegas 2019 (modern) (modern) | starting rating: 1374 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 144 | Kuhnke, Prez (1501) | Won 2-1 | +201394 |
| 2modern | 134 | Burkett, Joseph (1496) | Lost 0-2 | -161378 |
| 3modern | 557 | LaVassaur, Chris (1568) | Lost 1-2 | -151363 |
| 4modern | 664 | Jones, Brandon (1549) | Lost 1-2 | -151348 |
| top | average opponent: 1529record: 1-3 | new rating: 1348 | ||
| Grand Prix Las Vegas 2015 (2) (MM2 limited) | starting rating: 1391 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 33 | Hughes, Jim (1411) | Lost 0-2 | -171374 |
| top | record: 0-1 | new rating: 1374 | ||
| Grand Prix Las Vegas 2013 (MMA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 495 | Morse, Tyler (1501) | Lost 0-2 | -181482 |
| 2sealed | 824 | Hsieh, John (1472) | Lost 0-2 | -181464 |
| 3sealed | 947 | Ordinario, Patrick (1464) | Lost 0-2 | -181446 |
| 5sealed | 789 | Wetzel, Jonathan (1449) | Lost 0-2 | -181428 |
| 6sealed | 651 | Noel, William (1329) | Lost 0-2 | -201408 |
| 7sealed | 518 | Bjorndahl, Timothy (1467) | Lost 0-2 | -171391 |
| top | average opponent: 1447record: 0-6 | new rating: 1391 | ||