Johnson, Jeff R
Current rating: 1501
| Grand Prix Miami 2015 (FRF standard) | starting rating: 1469 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 248 | Peralta, Rafael (1469) | Lost 0-2 | -181451 |
| 4standard | 255 | Gates, Vincent (1517) | Won 2-1 | +191470 |
| 5standard | 225 | Moulton, Jesse (1906) | Lost 1-2 | -101460 |
| 6standard | 276 | Page, Joe (1486) | Lost 1-2 | -181442 |
| 7standard | 311 | Henderson, Kylie (1483) | Won 2-0 | +191461 |
| 8standard | 223 | Fedon, Gerardo (1654) | Won 2-0 | +211482 |
| 9standard | 152 | Epstein, Orr (1519) | Won 2-0 | +191501 |
| top | average opponent: 1576record: 4-3 | new rating: 1501 | ||
| Grand Prix Orlando 2014 (KTK limited) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 76 | Marks, Matthew (1518) | Lost 0-2 | -191508 |
| 4sealed | 190 | Acosta, Nicolas (1291) | Lost 0-0 | -221486 |
| 5sealed | 247 | Johnson, Jeff (1511) | Lost 0-2 | -171469 |
| top | average opponent: 1440record: 0-3 | new rating: 1469 | ||
| Grand Prix Miami 2013 (DGM standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 4standard | 88 | Herr, Joshua (1627) | Won 2-0 | +201520 |
| 5standard | 51 | Hammers, Dave M (1572) | Won 2-1 | +191539 |
| 6standard | 19 | Albergo, Patrick (1607) | Lost 1-2 | -171522 |
| 7standard | 58 | Greenfield, Jett (1581) | Won 2-0 | +201542 |
| 8standard | 57 | Stead, Bill (1675) | Draw 1-1 | +21544 |
| 9standard | 43 | Kisamore, Morgan (1575) | Lost 0-2 | -171527 |
| top | average opponent: 1606record: 3-2-1 | new rating: 1527 | ||