Cox, Marlin
Current rating: 1415
Record: 4-11-2
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1461 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 173 | Klusa, Mark (1826) | Lost 0-2 | -111450 |
| 3modern | 365 | Hefley, Dustin (1484) | Lost 0-0 | -181432 |
| 4modern | 582 | Clyburn, Brandon (1442) | Lost 1-2 | -171415 |
| top | average opponent: 1584record: 0-3 | new rating: 1415 | ||
| Grand Prix Dallas-Fort Worth 2015 (ORI limited) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 151 | Vargas, Evan (1653) | Lost 0-2 | -151450 |
| 3sealed | 589 | Anders, Andrew (1521) | Won 2-1 | +201470 |
| 4sealed | 298 | Boehm, William (1519) | Won 2-1 | +191489 |
| 5sealed | 215 | Palmer, David (1644) | Lost 0-2 | -161473 |
| 6sealed | 447 | Pardee, Samuel (1810) | Lost 1-2 | -121461 |
| top | average opponent: 1630record: 2-3 | new rating: 1461 | ||
| Grand Prix Memphis 2015 (FRF standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 157 | Cordy, Preston (1737) | Lost 1-2 | -131469 |
| 4standard | 283 | Jarvis, Aaron (1635) | Won 2-0 | +211490 |
| 5standard | 188 | Fountain, Nathan (1601) | Lost 1-2 | -161474 |
| 6standard | 162 | Mann, Stephen (1917) | Lost 1-2 | -111463 |
| 7standard | 267 | Miller, James (1528) | Won 2-1 | +191482 |
| 8standard | 197 | Wrenn, Gunner (1522) | Lost 1-2 | -171465 |
| top | average opponent: 1657record: 2-4 | new rating: 1465 | ||
| Grand Prix San Antonio 2014 (KTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 49 | Plantz, Ian (1500) | Lost 0-2 | -181482 |
| 2standard | 386 | Reese, Brian (1482) | Draw 1-1 | 01482 |
| 3standard | 485 | Clodfelter, Jacob (1482) | Draw 1-1 | 01482 |
| top | average opponent: 1488record: 0-1-2 | new rating: 1482 | ||