Hamerski, Calvin
Current rating: 1473
| Grand Prix Richmond 2014 (modern) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 91 | Kelly, Adam (1500) | Won 2-0 | +191484 |
| 2modern | 128 | Lewis, Stephen (1576) | Won 2-0 | +201504 |
| 3modern | 47 | Davis, Ethan (1473) | Lost 1-2 | -191485 |
| 4modern | 210 | Pajerski, Tyler (1518) | Lost 1-2 | -171468 |
| 5modern | 393 | Martin, Josh (1598) | Won 2-0 | +201488 |
| 6modern | 227 | Midiri, Michael (1539) | Lost 1-2 | -171471 |
| 7modern | 265 | O'Brien, Matt (1585) | Draw 1-1 | +21473 |
| top | average opponent: 1541record: 3-3-1 | new rating: 1473 | ||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 151 | Lukens, Joshua H (1500) | Lost 1-2 | -181465 |
| 2sealed | 379 | Wise, Brad (1482) | Won 2-0 | +181483 |
| 3sealed | 412 | Milam, Alex (1501) | Won 2-0 | +191502 |
| 4sealed | 353 | Smith, Ryan (1453) | Lost 1-2 | -191483 |
| 5sealed | 273 | Pegg, Byron (1500) | Lost 0-2 | -181465 |
| top | average opponent: 1487record: 2-3 | new rating: 1465 | ||
| Grand Prix Charleston 2012 (RTR standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 144 | McGinn, Trey (1584) | Lost 0-0 | -161484 |
| 2standard | 185 | Frederick, Ray R (1500) | Lost 0-2 | -181466 |
| 3standard | 278 | Morning, Matthew (1466) | Draw 1-1 | 01466 |
| 4standard | 301 | Burnett, Jason (1410) | Won 2-0 | +171483 |
| 5standard | 250 | Cox, Preston (1499) | Draw 1-1 | 01483 |
| 6standard | 244 | Anderson, James G (1470) | Draw 1-1 | 01483 |
| top | average opponent: 1488record: 1-2-3 | new rating: 1483 | ||