Sak, Brian
Current rating: 1450
Record: 5-8
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 494 | Berenhaus, Jordan (1500) | Lost 1-2 | -181467 |
| 2modern | 912 | Clark, Jared (1440) | Lost 0-2 | -181449 |
| 3modern | 1290 | Stano, Tracy (1463) | Won 2-1 | +181467 |
| 4modern | 865 | Macdonell, Jyles (1481) | Won 2-0 | +181485 |
| 5modern | 952 | Izquierdo, Charlie (1499) | Lost 0-2 | -171468 |
| 6modern | 775 | Giovannagelo, Christopher (1505) | Lost 0-2 | -181450 |
| average opponent: 1481record: 2-4 | new rating: 1450 | |||
| Grand Prix Charlotte 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 771 | Cross, Michael S (1500) | Lost 1-2 | -181482 |
| 2modern | 935 | Beasley, Jess (1397) | Lost 0-2 | -201462 |
| 3modern | 1085 | Mills, Hunter B (1465) | Won 2-0 | +191481 |
| 4modern | 1033 | Rose, Charles (1480) | Won 2-0 | +171498 |
| 5modern | 902 | West, David (1521) | Won 2-0 | +191517 |
| 6modern | 804 | Fulk, David (1803) | Lost 0-2 | -131504 |
| 7modern | 728 | Gaskill, Patrick (1461) | Lost 0-2 | -191485 |
| average opponent: 1518record: 3-4 | new rating: 1485 | |||