Parker, Marshall
Current rating: 1430
Record: 0-4
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 468 | Turner, Scott (1508) | Lost 1-2 | -181482 |
| 2modern | 357 | Camp, Jacob (1482) | Lost 0-2 | -181464 |
| 3modern | 596 | Fairchild, Stephen (1491) | Lost 0-0 | -171447 |
| 4modern | 1078 | Koson, Todd (1540) | Lost 1-2 | -171430 |
| average opponent: 1505record: 0-4 | new rating: 1430 | |||