Jeffries, Justin
Current rating: 1397
Record: 1-7
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1427 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 553 | Bryant, Cristopher (1447) | Won 2-0 | +181445 |
| 2modern | 411 | Estrada, Robert (1618) | Lost 0-2 | -141431 |
| 3modern | 361 | Padilla, Jonathan (1500) | Lost 0-2 | -171414 |
| 4modern | 725 | Lassiter, Shawn (1486) | Lost 0-2 | -171397 |
| average opponent: 1513record: 1-3 | new rating: 1397 | |||
| Grand Prix Las Vegas 2017 (modern) (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 385 | Remmer, Aaron (1486) | Lost 1-2 | -181482 |
| 2modern | 731 | Staib, Rich (1549) | Lost 0-2 | -171465 |
| 3modern | 2202 | McCann, Barbara (1357) | Lost 1-2 | -201445 |
| 4modern | 1450 | Bressler, Benjamin (1445) | Lost 0-2 | -181427 |
| average opponent: 1459record: 0-4 | new rating: 1427 | |||