Grenfell, Hunter
Current rating: 1574
Record: 11-7
| Grand Prix Washington DC 2014 (JOU limited) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 309 | Griffith, Alex (1530) | Lost 0-2 | -181498 |
| 2sealed | 479 | Backof, Peter (1480) | Won 2-0 | +181516 |
| 3sealed | 485 | Reen, Rory (1501) | Lost 1-2 | -181498 |
| 4sealed | 523 | Wolfe, Maryann (1479) | Won 2-1 | +171515 |
| 5sealed | 366 | Shue, Ryan (1503) | Won 2-0 | +181533 |
| 6sealed | 350 | Goodman, Stephen (1558) | Won 2-0 | +191552 |
| 7sealed | 262 | Carr, Brandon (1541) | Won 2-0 | +171569 |
| 8sealed | 117 | Stojak, Peter (1523) | Lost 1-2 | -181551 |
| 9sealed | 151 | Evaldi, Mark (1851) | Won 2-0 | +231574 |
| average opponent: 1552record: 6-3 | new rating: 1574 | |||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 912 | Martinez, Will (1500) | Won 2-0 | +181518 |
| 2standard | 789 | Reid, Kelly B (1500) | Lost 1-2 | -181500 |
| 3standard | 872 | Feeley, Sam (1469) | Won 2-0 | +171517 |
| 4standard | 827 | Napoli, Phillip (1485) | Lost 0-2 | -181499 |
| 5standard | 834 | Walmsley, Billy (1433) | Won 2-1 | +161515 |
| 6standard | 826 | Vanwie, Michael (1486) | Won 2-0 | +181533 |
| 7standard | 773 | Lindroos, Jani (1602) | Lost 1-2 | -171516 |
| 8standard | 750 | Rudy, Ian (1519) | Won 2-0 | +181534 |
| 9standard | 691 | Easton, Joe (1537) | Lost 0-2 | -181516 |
| average opponent: 1503record: 5-4 | new rating: 1516 | |||