Witkowski, Joey
Current rating: 1437
Record: 4-8
| Grand Prix Pittsburgh 2011 (M12 standard) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 70 | Samek, Jessy (1505) | Lost 1-2 | -181448 |
| 2standard | 454 | Sinacola, Jonas (1518) | Lost 0-2 | -171431 |
| 3standard | 580 | Torbochkin, Leo (1464) | Won 2-1 | +191450 |
| 4standard | 550 | Lawrence, Andrew (1470) | Lost 1-2 | -181432 |
| 5standard | 567 | Minor, Nicholas (1463) | Won 2-1 | +191451 |
| 6standard | 453 | Simonot, Timothee (1680) | Lost 0-2 | -141437 |
| average opponent: 1517record: 2-4 | new rating: 1437 | |||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 894 | Smith, Eric J (1500) | Won 2-1 | +181518 |
| 2standard | 827 | Friedman, Ben (1500) | Lost 0-2 | -181500 |
| 3standard | 825 | Murphy, Richard C (1500) | Won 2-0 | +181518 |
| 4standard | 865 | Mulcahy, Luke (1621) | Lost 0-2 | -161502 |
| 5standard | 863 | Gilliam, Justin L (1501) | Lost 1-2 | -181484 |
| 6standard | 906 | Prine, Shaloni M (1481) | Lost 0-2 | -181466 |
| average opponent: 1517record: 2-4 | new rating: 1466 | |||