Grubham, Aaron
Current rating: 1414
Record: 6-12-1
| Grand Prix Cleveland 2019 (RNA limited) | starting rating: 1431 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 240 | Watts, Zach (1626) | Lost 0-2 | -141417 |
| 2sealed | 314 | Mast, Anthony (1611) | Lost 0-2 | -151402 |
| 4sealed | 434 | Bevan, Caleb (1483) | Won 2-1 | +201422 |
| 5sealed | 342 | Olea Garcia, Alejandro (1732) | Lost 1-2 | -131409 |
| 6sealed | 371 | Orr, Daniel (1502) | Won 2-0 | +201429 |
| 7sealed | 280 | Szyinski, Piotr (1626) | Lost 0-2 | -151414 |
| top | average opponent: 1597record: 2-4 | new rating: 1414 | ||
| Grand Prix Minneapolis 2016 (SOI standard) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 522 | Johnson, Richard 1301 (1500) | Lost 0-2 | -171431 |
| top | record: 0-1 | new rating: 1431 | ||
| Grand Prix Las Vegas 2015 (1) (MM2 limited) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 304 | Camacho, Kevin (1499) | Draw 1-1 | 01484 |
| 2sealed | 234 | Staver, Matthew (1480) | Lost 0-2 | -181466 |
| 3sealed | 361 | Theodore, Bridget (1482) | Lost 0-2 | -181448 |
| top | average opponent: 1487record: 0-2-1 | new rating: 1448 | ||
| Grand Prix San Antonio 2014 (KTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 154 | Garcia, Mario (1500) | Lost 0-2 | -181482 |
| 2standard | 362 | West, David (1482) | Lost 0-2 | -181464 |
| 3standard | 546 | Ford, John (1447) | Lost 0-2 | -181446 |
| 4standard | 523 | Bennett, Sue (1394) | Won 2-1 | +171463 |
| 5standard | 444 | Perez, Rodolfo (1464) | Won 2-1 | +181481 |
| 6standard | 358 | Williams, Sam (1599) | Lost 0-2 | -161465 |
| 7standard | 307 | Castigan, Matthew (1464) | Won 2-1 | +181483 |
| 8standard | 224 | Soliz, Noe (1485) | Lost 1-2 | -181465 |
| 9standard | 191 | Gonzales, Adam (1510) | Won 2-0 | +191484 |
| top | average opponent: 1483record: 4-5 | new rating: 1484 | ||