Walker, Jonathan
Current rating: 1381
| Grand Prix Los Angeles 2019 (modern) | starting rating: 1391 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 32 | Vicario, Ivan (1467) | Lost 1-2 | -171374 |
| 2modern | 540 | Valiere, Andrew (1486) | Lost 1-2 | -161358 |
| 3modern | 663 | Gayatinea, Ryan (1483) | Lost 1-2 | -161342 |
| 4modern | 721 | Bailey, Braden (1447) | Won 2-1 | +201362 |
| 5modern | 625 | Corral, Jarred (1406) | Won 2-0 | +191381 |
| top | average opponent: 1458record: 2-3 | new rating: 1381 | ||
| Grand Prix Austin 2012 (ISD limited) | starting rating: 1462 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 73 | Corder, Danny (1446) | Lost 0-2 | -191443 |
| 2sealed | 319 | Wredberg, Gregory (1472) | Lost 0-2 | -171426 |
| 3sealed | 431 | Ellison, Erik (1449) | Lost 0-2 | -181408 |
| 4sealed | 461 | Zeller, Joseph (1429) | Lost 0-2 | -171391 |
| top | average opponent: 1449record: 0-4 | new rating: 1391 | ||
| Grand Prix Detroit 2001 (PLS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 93 | Ossipov, George (1500) | Lost 0-2 | -181482 |
| 2sealed | 212 | Roman, Karen (1482) | Won 2-1 | +181500 |
| 3sealed | 167 | Kiernan, Jason (1431) | Lost 0-2 | -191481 |
| 4sealed | 207 | Klein, Andrew (1418) | Lost 0-2 | -191462 |
| top | average opponent: 1458record: 1-3 | new rating: 1462 | ||