Porzio, David
Current rating: 1579
Record: 10-6-1
| Grand Prix Washington DC 2013 (legacy) | starting rating: 1525 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 241 | Holbrook, Michael (1500) | Won 2-0 | +171542 |
| 2legacy | 244 | Griffin, Eric (1591) | Won 2-0 | +191561 |
| 3legacy | 93 | Hein, Christopher (1495) | Lost 0-2 | -191542 |
| 4legacy | 319 | Hickey, Jared (1504) | Won 2-0 | +171559 |
| 5legacy | 646 | Macejka, Larry (1467) | Lost 0-2 | -191540 |
| 6legacy | 436 | Warren, Chris (1437) | Won 2-0 | +161556 |
| 7legacy | 331 | McDaniel, Chris (1755) | Won 2-0 | +211577 |
| 8legacy | 442 | Kvartek, Chris (1632) | Won 2-1 | +191596 |
| 9legacy | 99 | Merced, Davis (1607) | Lost 1-2 | -171579 |
| average opponent: 1554record: 6-3 | new rating: 1579 | |||
| Grand Prix Pittsburgh 2011 (M12 standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 209 | Pickens, Joshua (1500) | Won 2-0 | +181518 |
| 2standard | 126 | Gluck, Terrence (1537) | Lost 0-2 | -181500 |
| 3standard | 381 | DiPrinzio, Nicholas (1450) | Won 2-0 | +171517 |
| 4standard | 272 | Novak, Daniel A (1502) | Won 2-0 | +181535 |
| 5standard | 180 | Ward, Evan (1535) | Won 2-1 | +181553 |
| 6standard | 86 | Hakakian, Joshua (1621) | Draw 1-1 | +11554 |
| 7standard | 132 | McDuffie, Korey (1933) | Lost 0-2 | -111543 |
| 8standard | 225 | Pappas, Jonathan (1537) | Lost 0-2 | -181525 |
| average opponent: 1577record: 4-3-1 | new rating: 1525 | |||