Zimmerman, Rob
Current rating: 1509
Record: 14-16
| Grand Prix Las Vegas 2019 (modern) (modern) | starting rating: 1526 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 111 | Martin, James (1455) | Won 2-1 | +171543 |
| 2modern | 137 | Barile, Michael (1467) | Won 2-1 | +171560 |
| 3modern | 265 | Blanchard, Mac (1717) | Lost 0-2 | -161544 |
| 4modern | 488 | Dougherty, Phillip (1523) | Lost 0-2 | -181526 |
| 5modern | 532 | Connolly, Jeffrey (1569) | Lost 0-2 | -171509 |
| top | average opponent: 1546record: 2-3 | new rating: 1509 | ||
| Grand Prix Washington DC 2017 (HOU standard) | starting rating: 1523 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 463 | Fuentes, Calosso (1774) | Won 2-0 | +231546 |
| 2standard | 314 | Morfessis, Nikolaos (1516) | Won 2-1 | +171563 |
| 3standard | 239 | Ledermann, Kyle (1536) | Lost 1-2 | -181545 |
| 4standard | 374 | Fielman, Josh (1511) | Lost 0-2 | -191526 |
| top | average opponent: 1584record: 2-2 | new rating: 1526 | ||
| Grand Prix New York 2016 (SOI standard) | starting rating: 1463 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 107 | Glickman, Samuel (1500) | Lost 1-2 | -181445 |
| 2standard | 494 | Pienkny, Jedidiah (1483) | Won 2-0 | +191464 |
| 3standard | 641 | McGuire, Sean (1539) | Won 2-0 | +191483 |
| 4standard | 403 | Lee, Robert (1528) | Won 2-0 | +191502 |
| 5standard | 231 | Robins, Scott (1651) | Won 2-0 | +211523 |
| 6standard | 89 | Folinus, Jeff (1904) | Won 2-0 | +241547 |
| 7standard | 83 | Walter, Royce (2069) | Lost 1-2 | -91538 |
| 8standard | 230 | Jessup, Daniel (1695) | Lost 1-2 | -151523 |
| 9standard | 363 | Hodlofski, Sean (1546) | Won 2-1 | +181541 |
| 10standard | 150 | Cain, Raymond (1537) | Won 2-1 | +181559 |
| 11standard | 120 | Leone, Mike (1551) | Lost 0-2 | -181541 |
| 12standard | 205 | Schlactus, Brian (1554) | Lost 1-2 | -181523 |
| top | average opponent: 1630record: 7-5 | new rating: 1523 | ||
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1447 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 361 | Coulter, Daniel (1500) | Won 2-0 | +191466 |
| 2modern | 97 | Conroy, Andre (1474) | Won 2-0 | +181484 |
| 3modern | 26 | Lang, Robert (1500) | Won 2-1 | +181502 |
| 4modern | 138 | Hum, Barry (1647) | Lost 1-2 | -151487 |
| 5modern | 511 | Orange, Gregory (2049) | Lost 1-2 | -91478 |
| 6modern | 595 | Bruggeman, Lucas (1603) | Lost 1-2 | -151463 |
| top | average opponent: 1629record: 3-3 | new rating: 1463 | ||
| Grand Prix Philadelphia 2005 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 15 | Cuellari, Robert (1500) | Lost 0-2 | -181482 |
| 2legacy | 184 | Ketita, Nassim (1491) | Lost 0-2 | -181464 |
| 3legacy | 204 | Richardson, Jason (1507) | Lost 0-2 | -171447 |
| top | average opponent: 1499record: 0-3 | new rating: 1447 | ||