Williams, Mark
Current rating: 1439
Record: 5-9
| Grand Prix Las Vegas 2019 (limited) (MH1 limited) | starting rating: 1436 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 290 | Rickman, Edward (1471) | Won 2-1 | +191455 |
| 2sealed | 155 | Herren, Jason (1386) | Won 2-1 | +171472 |
| 3sealed | 101 | Kiyonaga, Adam (1473) | Lost 1-2 | -181454 |
| 4sealed | 267 | An, Peter (1624) | Lost 0-2 | -151439 |
| top | average opponent: 1488record: 2-2 | new rating: 1439 | ||
| Grand Prix Denver 2019 (M20 standard) | starting rating: 1453 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 167 | Kohrt, Brandon (1500) | Lost 0-2 | -171436 |
| top | record: 0-1 | new rating: 1436 | ||
| Grand Prix Indianapolis 2015 (BFZ standard) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 102 | Dashner, Michael (1449) | Lost 1-2 | -181428 |
| 2standard | 409 | Kingsley, Kevin (1640) | Won 2-1 | +221450 |
| 3standard | 298 | Tople, Jonathan (1500) | Won 2-1 | +191469 |
| 4standard | 334 | Santana, Marcus (1517) | Won 2-1 | +191488 |
| 5standard | 139 | Leeka, Ryan (1537) | Lost 0-2 | -171471 |
| 6standard | 262 | Riggs, Christopher (1518) | Lost 1-2 | -181453 |
| top | average opponent: 1527record: 3-3 | new rating: 1453 | ||
| Grand Prix Orlando 2014 (KTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 121 | Brunson, Daniel (1500) | Lost 1-2 | -181482 |
| 2sealed | 379 | Hunter, Andrew (1482) | Lost 1-2 | -181464 |
| 3sealed | 457 | Allen, Devante (1464) | Lost 0-2 | -181446 |
| top | average opponent: 1482record: 0-3 | new rating: 1446 | ||