Hammac, Greg
Current rating: 1499
| Grand Prix Orlando 2014 (KTK limited) | starting rating: 1468 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 729 | Mendonca, Rafael (1829) | Won 2-1 | +241492 |
| 3sealed | 157 | Yu, Jarvis (1780) | Lost 0-2 | -131479 |
| 4sealed | 236 | Holloway, Zack (1516) | Won 0-0 | +191498 |
| 5sealed | 208 | Sardinas, Oscar (1561) | Lost 0-2 | -171481 |
| 6sealed | 240 | Barrientos, Daniel (1519) | Won 2-1 | +191500 |
| 7sealed | 165 | King, David (1446) | Won 2-0 | +171517 |
| 8sealed | 73 | Coer, Benjamin (1544) | Lost 0-2 | -181499 |
| top | average opponent: 1599record: 4-3 | new rating: 1499 | ||
| Grand Prix Atlanta 2014 (JOU limited) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 391 | Rasmussen, Ron (1580) | Lost 0-2 | -171501 |
| 3sealed | 500 | Nestico, Mark (1672) | Lost 0-2 | -151486 |
| 4sealed | 688 | Hebert, Jonathan (1482) | Lost 1-2 | -181468 |
| top | average opponent: 1578record: 0-3 | new rating: 1468 | ||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 68 | Herrington, Aaron (1500) | Won 2-0 | +181518 |
| 2sealed | 35 | Barger, Jordan (1518) | Won 2-0 | +181536 |
| 3sealed | 124 | Gill, Dillon (1536) | Won 2-0 | +181554 |
| 4sealed | 100 | Smith, Shane (1564) | Lost 1-2 | -181536 |
| 5sealed | 122 | Dennis B., (1518) | Lost 0-2 | -181518 |
| 6sealed | 234 | Bower, Ross (1501) | Won 2-0 | +181536 |
| 7sealed | 131 | Curran, Jack M (1537) | Lost 1-2 | -181518 |
| top | average opponent: 1525record: 4-3 | new rating: 1518 | ||