Roosa, Zach
Current rating: 1605
Record: 27-21
| Regional Championships Dallas 2023 (pioneer) | starting rating: 1673 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 570 | Cushing, Mickey (1521) | Won 2-0 | +161689 |
| 2pioneer | 56 | Hutson, Tal (1516) | Lost 1-2 | -211668 |
| 3pioneer | 316 | Perret, Coleman (1651) | Lost 0-2 | -191649 |
| 4pioneer | 378 | Hogan, Kyle (1774) | Lost 1-2 | -151634 |
| 5pioneer | 437 | Gross, Joe (1466) | Lost 1-2 | -211613 |
| 6pioneer | 460 | Brock, Joshua (1334) | Won 2-0 | +131626 |
| 7pioneer | 385 | Ulep, Michael (1472) | Lost 0-2 | -211605 |
| top | average opponent: 1534record: 2-5 | new rating: 1605 | ||
| Grand Prix Las Vegas 2019 (modern) (modern) | starting rating: 1638 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 208 | Salah, Jamel (1505) | Won 2-1 | +151653 |
| 2modern | 275 | Altamirano, Nick (1579) | Won 2-1 | +171670 |
| 3modern | 210 | Tan, Frederick (1482) | Lost 0-2 | -211649 |
| 4modern | 530 | Zhao, Michael [USA] (1468) | Won 2-0 | +141663 |
| 5modern | 173 | Moran, Kyle (1659) | Won 2-0 | +181681 |
| 6modern | 205 | Marien, Drew (1519) | Won 2-1 | +151696 |
| 7modern | 28 | Parra, Andrew (1568) | Won 2-1 | +161712 |
| 8modern | 51 | Burns-Kirkness, Rowan (1722) | Lost 0-2 | -181694 |
| 9modern | 85 | Tran, Kenwon (1500) | Won 2-0 | +151709 |
| 10modern | 2045 | Milechman, Daniel (1818) | Lost 0-2 | -161693 |
| 11modern | 2101 | Wilbert, Adam (1606) | Lost 0-2 | -201673 |
| 12modern | 2125 | Russell, Tyler (1698) | Won 2-1 | +191692 |
| 13modern | 2104 | Campbell, Chantelle (1681) | Lost 1-2 | -191673 |
| top | average opponent: 1600record: 8-5 | new rating: 1673 | ||
| Grand Prix Calgary 2019 (modern) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 162 | Ostertag, Eric (1534) | Won 2-0 | +181545 |
| 4modern | 73 | Gottselig, Mark (1661) | Won 2-1 | +201565 |
| 5modern | 31 | Lowther, Clayton (1558) | Lost 1-2 | -181547 |
| 6modern | 54 | Hoffos, Mason (1646) | Lost 1-2 | -161531 |
| 7modern | 154 | Spicer, Kory (1469) | Won 2-1 | +171548 |
| 8modern | 117 | Tilsen, Patrick (1793) | Won 2-0 | +221570 |
| 9modern | 31 | Listoe, Levi (1607) | Lost 0-2 | -171553 |
| 10modern | 63 | Eichner, Benjamin (1470) | Won 2-0 | +161569 |
| 11modern | 55 | Pilling, Todd (1590) | Won 2-1 | +191588 |
| 12modern | 43 | Sahlstrom, Michael (1675) | Won 2-0 | +191607 |
| 13modern | 28 | Majlaton, Alex (2091) | Lost 1-2 | -101597 |
| 14modern | 27 | Beattie, Matthew (1615) | Won 2-0 | +191616 |
| 15modern | 28 | Brunson, Damyan (1846) | Won 2-1 | +221638 |
| top | average opponent: 1658record: 9-4 | new rating: 1638 | ||
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 1344 | Pederson-Linn, Glen (1500) | Won 2-0 | +181518 |
| 2modern | 22 | Risser, Ethan (1549) | Lost 1-2 | -171501 |
| 3modern | 762 | Agnew, Zackrie (1482) | Won 0-0 | +171518 |
| 4modern | 752 | Cline, Chance (1448) | Lost 1-2 | -191499 |
| 5modern | 1365 | Barnett, Scott (1502) | Won 2-0 | +181517 |
| 6modern | 349 | deQuack, Jacob (1522) | Won 2-0 | +181535 |
| 7modern | 1322 | Kent, Doug (1355) | Won 2-1 | +151550 |
| 8modern | 165 | Magdaleno, Joseph (1509) | Won 2-1 | +171567 |
| 9modern | 5218 | [anonymous] | Won 2-0 | +181585 |
| 10modern | 5084 | Pardee, Samuel (1983) | Won 2-1 | +251610 |
| 11modern | 5066 | Morawski, Jonathan (1774) | Lost 0-2 | -151595 |
| 12modern | 5064 | Madsen, Michael (1638) | Lost 1-2 | -171578 |
| 13modern | 5122 | Brisky, Chris (1565) | Lost 1-2 | -181560 |
| 14modern | 1559 | Murase, Hiroshi (1774) | Lost 1-2 | -151545 |
| 15modern | 5141 | Nguyen, Tri (1522) | Lost 0-2 | -181527 |
| top | average opponent: 1579record: 8-7 | new rating: 1527 | ||