O'Toole, Zack
Current rating: 1473
| Grand Prix Vancouver 2016 (OGW limited) | starting rating: 1493 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 338 | Henry, Taison (1500) | Lost 0-2 | -181475 |
| 2sealed | 766 | Chan, David (1466) | Won 2-0 | +181493 |
| 3sealed | 407 | Reyes, Milciades (1501) | Won 0-0 | +181511 |
| 4sealed | 309 | Rast, Samson (1483) | Won 2-1 | +181529 |
| 5sealed | 130 | Tsang, Justin (1488) | Won 2-1 | +171546 |
| 6sealed | 153 | Gray, Tyler (1505) | Lost 1-2 | -191527 |
| 7sealed | 247 | Hanley, Jacob (1482) | Lost 1-2 | -191508 |
| 8sealed | 352 | Chun, Alexander (1516) | Lost 1-2 | -171491 |
| 9sealed | 374 | Kwok, Stan (1504) | Lost 0-2 | -181473 |
| top | average opponent: 1494record: 4-5 | new rating: 1473 | ||
| Grand Prix Las Vegas 2015 (1) (MM2 limited) | starting rating: 1468 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 71 | Mesa, Joseph (1500) | Won 2-0 | +191487 |
| 2sealed | 164 | Williams, Douglas (1583) | Lost 0-2 | -171470 |
| 3sealed | 240 | Elkus, Nate (1501) | Won 2-0 | +191489 |
| 4sealed | 156 | Snyder, Michael E (1489) | Won 2-0 | +181507 |
| 5sealed | 63 | Kubo, Jason (1521) | Lost 1-2 | -181489 |
| 6sealed | 137 | Maini, Quentin (1624) | Won 2-1 | +211510 |
| 7sealed | 105 | Williams, Levi (1589) | Lost 1-2 | -171493 |
| top | average opponent: 1544record: 4-3 | new rating: 1493 | ||
| Grand Prix Toronto 2015 (DTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 287 | MacKinnon, Dan (1500) | Won 2-0 | +181518 |
| 2standard | 26 | Blair, Kieran (1520) | Lost 1-2 | -181500 |
| 3standard | 344 | Kailing, Michael (1731) | Lost 0-2 | -141486 |
| 4standard | 697 | Wauthier, Adam (1482) | Lost 1-2 | -181468 |
| top | average opponent: 1558record: 1-3 | new rating: 1468 | ||