Jeffery, Evan
Current rating: 1535
Record: 11-9-2
| Grand Prix Oklahoma City 2017 (modern) | starting rating: 1600 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 106 | Taylor, Forrest (1500) | Draw 1-1 | -21598 |
| 2modern | 357 | Abernathy, Phillip (1432) | Lost 0-1 | -211577 |
| 3modern | 563 | Kelly, Nathan (1482) | Draw 1-1 | -21575 |
| 4modern | 626 | Ybarra, Vincent (1471) | Lost 1-2 | -201555 |
| 5modern | 637 | La Fleur, Devin (1446) | Lost 0-2 | -201535 |
| top | average opponent: 1466record: 0-3-2 | new rating: 1535 | ||
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1544 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 234 | Hoyler, Andrew (1500) | Lost 0-2 | -191525 |
| 2modern | 517 | Tong, Richard (1482) | Won 2-0 | +171542 |
| 3modern | 495 | Brewer, Blake (1518) | Won 0-0 | +181560 |
| 4modern | 1027 | Reed, Randy (1505) | Won 2-1 | +171577 |
| 5modern | 126 | Felber, Andrew (1609) | Won 2-0 | +181595 |
| 6modern | 80 | Black, Kevin (1525) | Won 2-1 | +171612 |
| 7modern | 57 | Hendrix, Carl (1715) | Won 2-1 | +201632 |
| 8modern | 39 | Grissom, Koelten (1719) | Lost 0-2 | -161616 |
| 9modern | 48 | Tao, Jiachen (1730) | Lost 0-2 | -161600 |
| top | average opponent: 1589record: 6-3 | new rating: 1600 | ||
| Grand Prix Oklahoma City 2013 (THS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 244 | Vajgrt, Kelly (1500) | Won 1-0 | +181518 |
| 2sealed | 287 | Kim, Markus (1518) | Won 2-1 | +181536 |
| 3sealed | 169 | Bonzo, Zachary (1490) | Won 2-1 | +171553 |
| 4sealed | 112 | Crozier, Justin (1542) | Lost 0-2 | -181535 |
| 5sealed | 177 | Lentz, Jared (1519) | Won 2-1 | +181553 |
| 6sealed | 224 | Edwards, Mitchell (1549) | Won 2-0 | +181571 |
| 7sealed | 152 | Fain, Kinny (1607) | Lost 1-2 | -181553 |
| 8sealed | 221 | Ross, Tom (2063) | Lost 0-2 | -91544 |
| top | average opponent: 1599record: 5-3 | new rating: 1544 | ||