Jefferson, Matt
Current rating: 1505
Record: 6-6
| Grand Prix Columbus 2004 (DST limited) | starting rating: 1521 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 85 | Reilly, Michael (1578) | Won 2-0 | +191540 |
| 3sealed | 45 | Shirk, Jimmy (1535) | Won 2-0 | +181558 |
| 4sealed | 6 | haren, jonathan (1552) | Lost 1-2 | -181540 |
| 5sealed | 69 | Tsoi, Man (1608) | Lost 1-2 | -171523 |
| 6sealed | 197 | Nungester, Aaron (1520) | Lost 0-2 | -181505 |
| average opponent: 1559record: 2-3 | new rating: 1505 | |||
| Grand Prix Atlanta 2003 (8ED standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 32 | Gilley, Jonathan (1518) | Won 2-0 | +181518 |
| 3standard | 94 | Hubka, Chris (1517) | Won 2-1 | +181536 |
| 4standard | 74 | Minetz, Arthur (1541) | Lost 0-2 | -181518 |
| 5standard | 64 | Burt, Jarod (1644) | Won 2-1 | +211539 |
| 6standard | 68 | Jackson, Allen (1583) | Won 2-0 | +181557 |
| 7standard | 46 | Munlz, David (1540) | Lost 0-2 | -181539 |
| 8standard | 63 | Upham, Bryan (1516) | Lost 1-2 | -181521 |
| average opponent: 1551record: 4-3 | new rating: 1521 | |||