Marschall, Owen
Current rating: 1609
| Grand Prix New Jersey 2020 (THB limited) | starting rating: 1562 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 209 | Gist, Ryan (1493) | Won 2-0 | +171579 |
| 2sealed | 164 | Mazzant, Jared (1673) | Won 2-0 | +201599 |
| 3sealed | 203 | Muller, Chris (1756) | Lost 0-2 | -151584 |
| 4sealed | 272 | Cutaiar, Adam (1321) | Won 2-1 | +131597 |
| 5sealed | 269 | Lee, Robert 724 (1976) | Won 2-0 | +251622 |
| 6sealed | 68 | Smith, Erik (1776) | Lost 1-2 | -161606 |
| 7sealed | 212 | Shak, Marcus (1737) | Won 2-0 | +211627 |
| 8sealed | 96 | Collins, Chris (1807) | Won 2-1 | +211648 |
| 9sealed | 76 | Klein, Fabian (1828) | Won 2-0 | +211669 |
| 10draft | 77 | Brock, Kyle (1803) | Lost 1-2 | -151654 |
| 11draft | 71 | Kovac, Chase (1739) | Won 2-0 | +191673 |
| 12draft | 74 | Kaplan, Evan (1618) | Lost 0-2 | -191654 |
| 13draft | 119 | Alonso, Daniel (1660) | Lost 0-2 | -181636 |
| 14draft | 64 | Bernal, Joseph (1897) | Lost 0-2 | -131623 |
| 15draft | 41 | Weiser, Daniel (1845) | Lost 0-2 | -141609 |
| top | average opponent: 1729record: 8-7 | new rating: 1609 | ||
| Grand Prix Portland 2019 (ELD standard) | starting rating: 1527 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 119 | Stumme, Aiden (1500) | Lost 0-2 | -181509 |
| 2standard | 172 | Knowlton, Sam (1462) | Lost 0-2 | -191490 |
| 3standard | 227 | Edmondson, Jeremy (1377) | Draw 0-0 | -21488 |
| 4standard | 224 | Mendez, Jared (1495) | Won 2-0 | +181506 |
| 5standard | 193 | Vore, Daniel (1482) | Draw 1-1 | 01506 |
| 6standard | 178 | Simkovich, Robert (1589) | Won 2-0 | +191525 |
| 7standard | 144 | Ricci, Joseph (1673) | Won 2-1 | +211546 |
| 8standard | 125 | Wilson, Ryan (1470) | Won 2-0 | +161562 |
| top | average opponent: 1506record: 4-2-2 | new rating: 1562 | ||
| Grand Prix Pittsburgh 2016 (SOI standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 214 | Khan, Mustafa (1501) | Won 2-1 | +181518 |
| 2standard | 250 | Stamper, Mack (1500) | Lost 0-2 | -181500 |
| 3standard | 538 | Harrison, Shane (1466) | Won 2-0 | +171517 |
| 4standard | 366 | Sewall, Zachary (1634) | Won 2-1 | +201537 |
| 5standard | 307 | Rabin, Daniel (1538) | Won 2-0 | +181555 |
| 6standard | 142 | Ragsdale, Adam (1742) | Lost 0-2 | -141541 |
| 7standard | 230 | Duhaim, Samuel (1596) | Lost 0-2 | -171524 |
| 8standard | 270 | Spartz, Emerson (1681) | Won 2-1 | +201544 |
| 9standard | 165 | Johnson, Jon 0731 (1587) | Lost 0-2 | -171527 |
| top | average opponent: 1583record: 5-4 | new rating: 1527 | ||