Duffield, Cody
Current rating: 1497
Record: 8-9-1
| Grand Prix Las Vegas 2017 (modern) (modern) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 351 | Servantes, Lucas (1414) | Lost 0-2 | -201497 |
| top | record: 0-1 | new rating: 1497 | ||
| Grand Prix Denver 2015 (KTK standard) | starting rating: 1535 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 46 | Kong, Xiayang (1518) | Draw 1-1 | 01535 |
| 4standard | 158 | Deming, Daniel (1536) | Won 2-1 | +181553 |
| 5standard | 77 | Katz, Samuel (1550) | Lost 1-2 | -181535 |
| 6standard | 187 | Smith, Andrew I (1536) | Lost 0-2 | -181517 |
| top | average opponent: 1535record: 1-2-1 | new rating: 1517 | ||
| Grand Prix Phoenix 2014 (BNG standard) | starting rating: 1556 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 262 | Nguyen, David (1598) | Lost 1-2 | -171539 |
| 2standard | 365 | Glindmeyer, Gary (1482) | Won 2-1 | +171556 |
| 3standard | 486 | Alvarado Picazo, Arturo (1577) | Lost 0-2 | -171539 |
| 4standard | 630 | Lisgathe, Alyxander (1481) | Won 2-0 | +161555 |
| 5standard | 391 | Brown, Jeremy (1424) | Lost 0-2 | -201535 |
| top | average opponent: 1512record: 2-3 | new rating: 1535 | ||
| Grand Prix Las Vegas 2013 (MMA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 82 | Stefanova, Tsvetelina (1500) | Won 2-0 | +181518 |
| 2sealed | 256 | Pohjola, Brendan (1521) | Won 2-1 | +181536 |
| 3sealed | 49 | Greenberg, Harrison (1641) | Won 2-0 | +201556 |
| 4sealed | 295 | Lundblad, Erik (1560) | Won 2-0 | +181574 |
| 5sealed | 38 | DeTora, Melissa (1969) | Lost 1-2 | -111563 |
| 6sealed | 98 | Li, Chen (1845) | Lost 1-2 | -131550 |
| 7sealed | 79 | Smith, Alex L (1712) | Lost 1-2 | -151535 |
| 8sealed | 168 | Estrada, Caleb (1733) | Won 2-0 | +211556 |
| top | average opponent: 1685record: 5-3 | new rating: 1556 | ||