Mazzei, Mitch
Current rating: 1537
Record: 9-8-1
| Regional Championships Atlanta 2023 (pioneer) | starting rating: 1484 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 165 | Berry, Thomas (1521) | Won 2-0 | +181502 |
| 2pioneer | 26 | Mele, Nicholas (1701) | Lost 0-2 | -141488 |
| 3pioneer | 292 | Andersen, Nathaniel (1590) | Won 2-0 | +201508 |
| 4pioneer | 190 | Ward, Kris (1652) | Won 2-0 | +201528 |
| 5pioneer | 452 | Sosa, Jonas (1479) | Won 2-0 | +171545 |
| 6pioneer | 110 | Clark, Mason (1780) | Won 2-0 | +231568 |
| 7pioneer | 41 | Jakobovits, Julian (1678) | Lost 0-2 | -161552 |
| 8pioneer | 115 | Bernard, Taylor (1576) | Won 2-1 | +181570 |
| 9pioneer | 51 | Torres, Jasper (1592) | Draw 1-1 | 01570 |
| 10pioneer | 53 | Nasri, Bassel (1603) | Lost 1-2 | -171553 |
| 11pioneer | 108 | Black, Nathaniel (1660) | Lost 1-2 | -161537 |
| average opponent: 1621record: 6-4-1 | new rating: 1537 | |||
| Regional Championships San Diego 2023 (ONE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 397 | Wellman, Andrew (1413) | Won 2-0 | +161516 |
| 2standard | 77 | Sellman, Donovan (1518) | Won 2-0 | +181534 |
| 3standard | 105 | Skorik, Andrew (1731) | Lost 1-2 | -141520 |
| 4standard | 167 | Dunn, Ethan (1522) | Lost 0-2 | -181502 |
| 5standard | 217 | Weiss, Adam (1508) | Lost 1-2 | -181484 |
| 6standard | 351 | Yudt, Jack (1443) | Won 2-0 | +171501 |
| 7standard | 213 | Quackenbush, Kevin (1514) | Lost 0-2 | -171484 |
| average opponent: 1521record: 3-4 | new rating: 1484 | |||