DeMattei, Joseph
Current rating: 1447
Record: 1-4-1
| Grand Prix Los Angeles 2002 (ONS rochester) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 85 | Rode, Johnny (1521) | Lost 0-2 | -171465 |
| 3sealed | 132 | Elder, Ryan (1500) | Lost 0-2 | -181447 |
| average opponent: 1511record: 0-2 | new rating: 1447 | |||
| Grand Prix Las Vegas 2001 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 7 | Whaley, Jerry (1500) | Won 2-1 | +181518 |
| 2extended | 62 | Aldershof, Tom (1518) | Draw 1-1 | 01518 |
| 3extended | 67 | Plumb, Brian (1532) | Lost 0-2 | -181500 |
| 4extended | 150 | Greuel, Matthew (1482) | Lost 0-2 | -181482 |
| average opponent: 1508record: 1-2-1 | new rating: 1482 | |||