McMackin, Matt J
Current rating: 1441
| Grand Prix Columbus 2010 (legacy) | starting rating: 1475 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 200 | McKeirnan, Shannon P (1464) | Lost 1-2 | -191456 |
| 2legacy | 213 | Meadors, Allen (1482) | Won 2-1 | +191475 |
| 3legacy | 130 | Barnett, Jason (1577) | Lost 1-2 | -161459 |
| 4legacy | 263 | Orange, Gregory (1480) | Lost 1-2 | -181441 |
| top | average opponent: 1501record: 1-3 | new rating: 1441 | ||
| Grand Prix Chicago 2009 (legacy) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 4legacy | 50 | Smelski, Geoffrey T (1540) | Lost 0-2 | -161447 |
| 5legacy | 233 | Valley, Justin (1510) | Won 2-1 | +191466 |
| 6legacy | 104 | Ferrando, Matthew (1580) | Won 2-0 | +201486 |
| 7legacy | 46 | Raney, Tom (1582) | Won 2-0 | +201506 |
| 8legacy | 36 | Wang, Sean (1616) | Lost 1-2 | -161490 |
| 9legacy | 48 | Krejsa, Tomas (1651) | Lost 1-2 | -151475 |
| top | average opponent: 1580record: 3-3 | new rating: 1475 | ||
| Grand Prix Indianapolis 2008 (SHM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 14 | Price, Nathanial (1457) | Lost 0-2 | -191481 |
| 2sealed | 453 | Lam, Michael (1482) | Lost 1-2 | -181463 |
| top | average opponent: 1470record: 0-2 | new rating: 1463 | ||