Grawbarger, Mason
Current rating: 1440
Record: 13-17-1
| Grand Prix Toronto 2019 (modern) | starting rating: 1453 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 381 | Arsenault, Jason (1492) | Lost 0-2 | -171436 |
| 2modern | 409 | McClellan, Mason (1486) | Won 2-1 | +191455 |
| 3modern | 448 | Switzer, Wesley (1566) | Lost 0-2 | -161439 |
| 4modern | 466 | Choi, Roy (1481) | Won 2-0 | +181457 |
| 5modern | 451 | Cera, Ardi (1488) | Lost 0-2 | -171440 |
| top | average opponent: 1502record: 2-3 | new rating: 1440 | ||
| Grand Prix Toronto 2018 (modern) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 481 | Vasileff, Nick (1500) | Won 2-1 | +181500 |
| 2modern | 380 | Shen, Kyle (1616) | Lost 1-2 | -161484 |
| 3modern | 674 | Hauk, Trevor (1403) | Won 2-1 | +171501 |
| 4modern | 318 | Magnuson, Keenan (1431) | Won 2-0 | +161517 |
| 5modern | 339 | Shea, Kevin (1553) | Lost 0-2 | -171500 |
| 6modern | 429 | Lambaria, Joslyn (1607) | Lost 0-2 | -161484 |
| 7modern | 478 | Wieczorek, Patrick (1547) | Lost 1-2 | -171467 |
| 8modern | 433 | Winokur, Ben (1687) | Lost 1-2 | -141453 |
| top | average opponent: 1543record: 3-5 | new rating: 1453 | ||
| Grand Prix Vancouver 2017 (modern) | starting rating: 1461 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 2262 | Collins, Zac (1500) | Lost 1-2 | -171444 |
| 2modern | 2362 | Armitage, Darren (1482) | Won 2-0 | +181462 |
| 3modern | 2603 | Mewis, Keith (1507) | Won 2-0 | +191481 |
| 4modern | 2447 | Alberg, Robin (1466) | Won 2-0 | +181499 |
| 5modern | 2156 | Lohouse, Justin (1423) | Won 2-1 | +161515 |
| 6modern | 2139 | Perez, Ryan (1640) | Lost 0-2 | -151500 |
| 7modern | 2277 | Garossino, Joseph (1489) | Won 2-1 | +181518 |
| 8modern | 2197 | Smith, Ian [CAN] (1552) | Lost 0-2 | -181500 |
| 9modern | 2191 | Blake, Paul (1467) | Lost 1-2 | -181482 |
| top | average opponent: 1503record: 5-4 | new rating: 1482 | ||
| Grand Prix Detroit 2016 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 525 | Bray, Scott (1375) | Lost 0-2 | -201480 |
| 2modern | 830 | Alasadi, Mohamad (1483) | Won 2-0 | +181498 |
| 3modern | 938 | Verheyn, Steven (1376) | Lost 0-2 | -201478 |
| 4modern | 828 | Flanigan, Chris (1545) | Lost 0-2 | -171461 |
| 5modern | 1082 | Amato, Anthony (1462) | Lost 1-2 | -181443 |
| 6modern | 1057 | Kempher II, Charles (1448) | Won 2-0 | +181461 |
| 7modern | 896 | Bardelline, Jonathan (1421) | Won 2-0 | +171478 |
| 8modern | 726 | Yaple, Anjay (1486) | Draw 1-1 | 01478 |
| 9modern | 611 | Staiger, Erika (1512) | Lost 0-2 | -171461 |
| top | average opponent: 1456record: 3-5-1 | new rating: 1461 | ||