Gammon, Robert
Current rating: 1470
| Grand Prix Albuquerque 2016 (SOI limited) | starting rating: 1483 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 52 | Cruz, Rene (1527) | Won 2-0 | +191502 |
| 4sealed | 76 | Cruse, David (1678) | Lost 0-2 | -151487 |
| 5sealed | 142 | Eagle, Matthew (1607) | Lost 1-2 | -161471 |
| 6sealed | 312 | Kilburn, Brad (1410) | Won 2-1 | +171488 |
| 7sealed | 255 | Smith, RJ (1417) | Lost 0-2 | -191469 |
| 8sealed | 255 | Comella, Terrence (1509) | Lost 1-2 | -171452 |
| 9sealed | 285 | Cummings, Brandon (1503) | Won 2-1 | +181470 |
| top | average opponent: 1522record: 3-4 | new rating: 1470 | ||
| Grand Prix Las Vegas 2015 (1) (MM2 limited) | starting rating: 1539 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 107 | Schultz, Tyler (1518) | Lost 0-2 | -181521 |
| 3sealed | 347 | Jong, Philip (1484) | Lost 0-2 | -191502 |
| 4sealed | 329 | Zuniga, Daniel (1429) | Lost 1-2 | -191483 |
| top | average opponent: 1477record: 0-3 | new rating: 1483 | ||
| Grand Prix Salt Lake City 2014 (M15 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 126 | Gustafson, Kelson (1520) | Won 2-1 | +181518 |
| 3sealed | 51 | Edvalson, Eric (1535) | Won 2-0 | +191537 |
| 4sealed | 63 | Baker, Brandon (1571) | Won 2-1 | +181555 |
| 5sealed | 42 | Chou, Eldon (1588) | Lost 0-2 | -171538 |
| 6sealed | 116 | Rugg, Lorraine (1553) | Won 2-0 | +181556 |
| 7sealed | 51 | Gardner, Olin (1668) | Lost 0-2 | -161540 |
| 8sealed | 58 | Hakanson, Ben (1556) | Won 2-0 | +181558 |
| 9sealed | 63 | Nelson, Evan (1503) | Lost 1-2 | -191539 |
| top | average opponent: 1562record: 5-3 | new rating: 1539 | ||