Grwinski, Logan
Current rating: 1443
| Grand Prix Indianapolis 2017 (HOU limited) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 187 | Hopkins, James (1379) | Won 2-0 | +161466 |
| 2sealed | 86 | Bartlett, Greg (1560) | Won 2-1 | +201486 |
| 3sealed | 124 | Choi, Jungje (1710) | Won 2-0 | +221508 |
| 4sealed | 137 | Simon, Michael (1772) | Lost 0-2 | -131495 |
| 5sealed | 196 | Solomon, Nick (1462) | Lost 1-2 | -191476 |
| 6sealed | 299 | Scheer, Everett (1577) | Lost 0-2 | -161460 |
| 7sealed | 353 | Leighley, Mark (1502) | Lost 1-2 | -171443 |
| top | average opponent: 1566record: 3-4 | new rating: 1443 | ||
| Grand Prix Indianapolis 2016 (modern) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 479 | Johnson, Dan (1531) | Lost 1-2 | -171464 |
| 2modern | 622 | Cubenas, Chris (1598) | Won 2-0 | +201484 |
| 3modern | 618 | Letterhos, Zach (1502) | Lost 0-2 | -171467 |
| 4modern | 687 | Williams, Gabriel (1518) | Lost 0-2 | -171450 |
| 5modern | 849 | Blakley, Ryan (1354) | Won 2-0 | +161466 |
| 6modern | 772 | Kozack, Brian (1469) | Lost 0-2 | -181448 |
| 7modern | 691 | Nordeck, Rebekah (1464) | Won 2-0 | +181466 |
| 8modern | 575 | Mendola, Anthony (1549) | Lost 1-2 | -161450 |
| top | average opponent: 1498record: 3-5 | new rating: 1450 | ||
| Grand Prix Chicago 2014 (JOU standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 334 | Dudson, Liam (1500) | Won 2-0 | +181518 |
| 2standard | 213 | Ross, Brandon (1495) | Lost 1-2 | -181500 |
| 3standard | 312 | Preisig, Alex (1500) | Lost 0-2 | -181482 |
| 4standard | 343 | Berkley, Joseph (1446) | Won 2-1 | +171499 |
| 5standard | 326 | Driver, Daniel (1502) | Lost 0-0 | -181481 |
| 6standard | 319 | Daniels, Andrew (1481) | Lost 0-2 | -181463 |
| 7standard | 275 | Rodriguez, George (1463) | Won 2-0 | +181481 |
| top | average opponent: 1484record: 3-4 | new rating: 1481 | ||