Mattison, John
Current rating: 1466
Record: 3-5
| Grand Prix Los Angeles 2002 (ONS rochester) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 153 | Lynch, Ryan (1500) | Lost 0-2 | -181482 |
| 2sealed | 131 | Lovelace, Jonny (1482) | Lost 0-2 | -181464 |
| 3sealed | 182 | Cordon, Jonathan (1464) | Won 2-0 | +181482 |
| 4sealed | 177 | McKeehan, David (1482) | Won 2-1 | +181500 |
| 5sealed | 127 | Wee, Olwen (1561) | Lost 0-2 | -171483 |
| 6sealed | 124 | Aguilar, Juan (1485) | Lost 1-2 | -181465 |
| 7sealed | 101 | Rudil, Michelangelo (1482) | Lost 0-2 | -181447 |
| 8sealed | 83 | Taylor, Joel (1482) | Won 2-0 | +191466 |
| average opponent: 1492record: 3-5 | new rating: 1466 | |||