Oostrom, Zack
Current rating: 1398
Record: 7-14
| Grand Prix Toronto 2019 (modern) | starting rating: 1423 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 80 | Nelson, Spencer (1547) | Lost 0-2 | -161407 |
| 2modern | 478 | Haluszka, Jaroslaw (1482) | Won 2-1 | +201427 |
| 3modern | 454 | Campbell, Lachlan (1499) | Lost 1-2 | -171410 |
| 4modern | 553 | Garner, Derrick (1729) | Lost 1-2 | -121398 |
| top | average opponent: 1564record: 1-3 | new rating: 1398 | ||
| Grand Prix Toronto 2018 (modern) | starting rating: 1431 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 27 | Paradis, Jean-Claude (1519) | Lost 1-2 | -161415 |
| 2modern | 558 | Henry, Brenton (1616) | Lost 1-2 | -151400 |
| 3modern | 705 | Videto, Tyler (1460) | Won 2-0 | +201420 |
| 4modern | 580 | Johnson, Paul (1523) | Lost 0-2 | -171403 |
| 5modern | 702 | Tattrie, Bill (1488) | Won 2-0 | +201423 |
| top | average opponent: 1521record: 2-3 | new rating: 1423 | ||
| Grand Prix Toronto 2016 (SOI standard) | starting rating: 1485 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 19 | Sadowski, Andrew (1500) | Lost 0-2 | -181467 |
| 2standard | 580 | Jenkins, Chad (1495) | Lost 0-2 | -181449 |
| 3standard | 670 | Christie, Dyllan (1465) | Won 2-1 | +191468 |
| 4standard | 530 | Conrad, Cory (1396) | Lost 0-2 | -201448 |
| 5standard | 630 | Hopcroft, Bob (1491) | Lost 0-2 | -171431 |
| top | average opponent: 1469record: 1-4 | new rating: 1431 | ||
| Grand Prix Toronto 2015 (DTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 23 | Burrows-Johnson, Andrew (1500) | Lost 0-2 | -181482 |
| 2standard | 587 | Clark, Devon (1483) | Won 2-0 | +181500 |
| 3standard | 466 | Lacey, Andreas (1596) | Lost 1-2 | -161484 |
| 4standard | 667 | Piva, Brett (1481) | Won 2-1 | +181502 |
| 5standard | 475 | Hunech, Phillip (1500) | Lost 1-2 | -181484 |
| 6standard | 473 | Morrill, James (1500) | Won 2-0 | +181502 |
| 7standard | 398 | Dow, Shae (1539) | Lost 0-2 | -171485 |
| top | average opponent: 1514record: 3-4 | new rating: 1485 | ||