Mittner, Tom
Current rating: 1345
Record: 5-14
| Grand Prix Houston 2018 (RIX limited) | starting rating: 1377 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 7 | Cappa, Robert (1500) | Lost 1-2 | -161361 |
| 2sealed | 222 | Yuen, Timothy (1482) | Lost 0-2 | -161345 |
| top | average opponent: 1491record: 0-2 | new rating: 1345 | ||
| Grand Prix Oklahoma City 2017 (modern) | starting rating: 1406 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 274 | Steelman, Ryan (1500) | Lost 0-2 | -161390 |
| 2modern | 541 | Finn, Maverick (1467) | Won 2-1 | +191409 |
| 3modern | 126 | Roberson, Dustin (1519) | Lost 0-2 | -161393 |
| 4modern | 539 | French, Nathan (1485) | Lost 0-2 | -161377 |
| top | average opponent: 1493record: 1-3 | new rating: 1377 | ||
| Grand Prix Houston 2016 (OGW standard) | starting rating: 1497 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 539 | Nguyen, David (1501) | Lost 1-2 | -181479 |
| 2standard | 681 | Pritchard, Branden (1482) | Lost 1-2 | -181461 |
| 3standard | 810 | Crabb, William (1464) | Lost 0-2 | -181443 |
| 4standard | 839 | Pizzini, James (1400) | Lost 1-2 | -191424 |
| 5standard | 827 | Chance, Kelley (1427) | Lost 0-2 | -181406 |
| top | average opponent: 1455record: 0-5 | new rating: 1406 | ||
| Grand Prix Washington DC 2014 (JOU limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 68 | Upshaw, Justin (1461) | Won 2-1 | +171517 |
| 2sealed | 211 | Martin, Sean (1567) | Lost 0-2 | -171500 |
| 3sealed | 522 | Baker, Jesse (1415) | Won 2-0 | +171517 |
| 4sealed | 387 | Loftus, Conor (1494) | Lost 0-2 | -191498 |
| 5sealed | 431 | Snelling, Scott (1499) | Lost 0-2 | -181480 |
| 6sealed | 426 | Buckley, Matt (1497) | Won 2-0 | +191499 |
| 7sealed | 308 | Wu, Gavin (1432) | Won 2-0 | +161515 |
| 8sealed | 213 | Dell, Willis (1477) | Lost 1-2 | -181497 |
| top | average opponent: 1480record: 4-4 | new rating: 1497 | ||