Roach, Grant F
Current rating: 1469
Record: 2-4
| Grand Prix Houston 2013 (DGM limited) | starting rating: 1466 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 136 | Breland, Cody (1500) | Won 2-0 | +191485 |
| 2sealed | 169 | Nets, Tsuck (1519) | Lost 0-2 | -181467 |
| 3sealed | 343 | Hilton, Michael (1590) | Won 2-1 | +211488 |
| 4sealed | 199 | Feris, Samuel (1447) | Lost 0-2 | -191469 |
| average opponent: 1514record: 2-2 | new rating: 1469 | |||
| Grand Prix Austin 2012 (ISD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 202 | Blankenship, Arthur (1616) | Lost 0-2 | -161484 |
| 3sealed | 334 | Cummings, Michael J (1482) | Lost 1-2 | -181466 |
| average opponent: 1549record: 0-2 | new rating: 1466 | |||