Duncan, Justin
Current rating: 1522
Record: 4-3
| Grand Prix Las Vegas 2013 (MMA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 671 | Chi, Roy (1500) | Won 2-1 | +181518 |
| 2sealed | 758 | Leigh, Simon (1813) | Won 2-1 | +231541 |
| 3sealed | 715 | Gill, Alden (1535) | Lost 1-2 | -181523 |
| 4sealed | 663 | Flieg, Jeff (1451) | Won 2-1 | +171540 |
| 5sealed | 533 | Stokes, Shaun (1535) | Won 2-0 | +181558 |
| 6sealed | 645 | Kawamoto, Jeffree (1568) | Lost 1-2 | -181540 |
| 7sealed | 378 | Wolloch, Sam (1526) | Lost 0-2 | -181522 |
| average opponent: 1561record: 4-3 | new rating: 1522 | |||