Piper, John
Current rating: 1531
Record: 7-6
| Grand Prix Charlotte 2015 (modern) | starting rating: 1498 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 838 | Weiss, Shawn (1500) | Won 2-1 | +181516 |
| 2modern | 823 | McMicheaux, Zach (1525) | Won 2-0 | +181534 |
| 3modern | 804 | Nance, Hunter (1615) | Lost 1-2 | -161518 |
| 4modern | 893 | Winters, Connor (1484) | Won 2-0 | +171535 |
| 5modern | 717 | VanMeter, Chris (1827) | Lost 0-2 | -131522 |
| 6modern | 878 | Michel, Jacob (1519) | Won 2-0 | +181540 |
| 7modern | 633 | Calcano, Christian (2071) | Lost 0-2 | -91531 |
| average opponent: 1649record: 4-3 | new rating: 1531 | |||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 311 | Clark, Aaron (1543) | Won 2-1 | +191519 |
| 2sealed | 263 | Grant, Corina (1517) | Won 2-1 | +181537 |
| 3sealed | 88 | Vreatt, Matthew (1486) | Won 2-0 | +171554 |
| 4sealed | 21 | Cordy, Preston (1452) | Lost 0-2 | -201534 |
| 5sealed | 90 | Revord, Joshua (1526) | Lost 1-2 | -181516 |
| 6sealed | 291 | Lequire, Jonathan (1522) | Lost 0-2 | -181498 |
| average opponent: 1507record: 3-3 | new rating: 1498 | |||