Gumbinger, Mike
Current rating: 1508
Record: 6-6
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 102 | Gaster, Clifton R (1500) | Won 2-1 | +191483 |
| 2sealed | 166 | Quach, Anson (1496) | Won 2-1 | +181501 |
| 3sealed | 155 | Stambaugh, Trent (1578) | Won 2-0 | +191520 |
| 4sealed | 36 | Keaveny, Joseph (1744) | Lost 0-2 | -141506 |
| 5sealed | 82 | McMillin, Jared (1539) | Won 2-0 | +191525 |
| 6sealed | 133 | Jensen, Miller (1556) | Won 2-1 | +191544 |
| 7sealed | 38 | Tseng, Yen-Shyang (1521) | Lost 1-2 | -191525 |
| 8sealed | 77 | Dulak, David (1555) | Lost 1-2 | -171508 |
| average opponent: 1561record: 5-3 | new rating: 1508 | |||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 749 | Walker, Brian (1500) | Lost 0-2 | -181482 |
| 2standard | 981 | Buettner, Justin (1484) | Won 2-0 | +181500 |
| 3standard | 902 | Dowd, Thomas (1499) | Lost 0-2 | -181482 |
| 4standard | 956 | Ford, James D (1490) | Lost 0-2 | -181464 |
| average opponent: 1493record: 1-3 | new rating: 1464 | |||