Collins, Zac
Current rating: 1437
| Grand Prix Portland 2018 (modern) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 81 | Sayre III, Edward (1500) | Won 2-1 | +191489 |
| 2modern | 262 | Jones, Michael (1458) | Lost 1-2 | -191470 |
| 3modern | 517 | Checketts, Corey (1500) | Lost 0-2 | -171453 |
| 4modern | 570 | Henderson, Craig (1548) | Lost 0-2 | -161437 |
| top | average opponent: 1502record: 1-3 | new rating: 1437 | ||
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1423 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 399 | West, Jacob (1482) | Won 2-1 | +191442 |
| 2modern | 339 | Sherred, Nick (1521) | Won 2-1 | +191461 |
| 3modern | 163 | Armstrong, Sean (1586) | Won 2-0 | +201481 |
| 4modern | 82 | Kuhn, Aaron (1536) | Won 2-0 | +191500 |
| 5modern | 74 | Linn, Ricky (1777) | Won 2-0 | +231523 |
| 6modern | 20 | Beardsley, Jake (1683) | Lost 0-2 | -151508 |
| 7modern | 131 | Balistreri, Vincenzo (1572) | Lost 1-2 | -171491 |
| 8modern | 153 | Wong, Erik L (1552) | Won 2-1 | +191510 |
| 9modern | 5132 | Schlesinger, Gal (1776) | Lost 0-2 | -131497 |
| 10modern | 5205 | Hernandez, Tony (1584) | Won 2-1 | +201517 |
| 11modern | 5133 | Mata, Andrew (1685) | Lost 0-2 | -151502 |
| 12modern | 5174 | Klosterman, Stefan (1723) | Lost 1-2 | -141488 |
| 13modern | 5157 | Perez Alamillo, Domingo (1517) | Lost 0-2 | -181470 |
| top | average opponent: 1615record: 7-6 | new rating: 1470 | ||
| Grand Prix Vancouver 2017 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 2262 | Grawbarger, Mason (1461) | Won 2-1 | +171517 |
| 2modern | 2233 | Langford, Chris (1408) | Draw 1-1 | -21515 |
| 3modern | 2312 | Whaley, Christopher (1393) | Lost 1-2 | -201495 |
| 4modern | 2472 | Howard, Cody (1529) | Lost 0-2 | -171478 |
| 5modern | 2579 | Hilbach, Craig (1493) | Lost 0-2 | -181460 |
| 6modern | 2607 | Tang, Chris (1448) | Lost 0-2 | -181442 |
| 7modern | 2560 | Bakkala, Tony (1482) | Lost 1-2 | -171425 |
| 8modern | 2474 | Cote, Mitch (1426) | Won 2-0 | +181443 |
| 9modern | 2394 | Bessette, Jonathan (1331) | Lost 0-1 | -201423 |
| top | average opponent: 1441record: 2-6-1 | new rating: 1423 | ||