Lewis, Mac
Current rating: 1465
Record: 5-7
| Grand Prix Pittsburgh 2013 (GTC limited) | starting rating: 1495 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 184 | Poole, Jamie (1551) | Won 2-1 | +191514 |
| 2sealed | 84 | Romito, Alexander (1517) | Lost 1-2 | -181496 |
| 3sealed | 486 | Schmittinger, Cody (1498) | Won 2-0 | +181514 |
| 4sealed | 345 | Sukenik, Jonathan (1864) | Lost 1-2 | -121502 |
| 5sealed | 510 | Collier, Jason (1499) | Lost 0-2 | -181484 |
| 6sealed | 478 | Benson, Riley (1425) | Lost 0-2 | -191465 |
| average opponent: 1559record: 2-4 | new rating: 1465 | |||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 353 | Spacek, Amelia (1500) | Won 2-0 | +181518 |
| 2sealed | 32 | Allen, Evan (1410) | Won 2-0 | +161534 |
| 3sealed | 110 | Letsch, Michael (1434) | Lost 1-2 | -201514 |
| 4sealed | 167 | Meade, Chauncey (1441) | Won 2-1 | +171531 |
| 5sealed | 222 | Curie, Jeremy (1576) | Lost 1-2 | -171514 |
| 6sealed | 195 | Smith, Charles (1448) | Lost 0-2 | -191495 |
| average opponent: 1468record: 3-3 | new rating: 1495 | |||