Mezinko, John
Current rating: 1575
Record: 13-10
| Grand Prix Pittsburgh 2017 (AER standard) | starting rating: 1526 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 107 | Fiorilli, Michael (1458) | Lost 1-2 | -191507 |
| 3standard | 404 | Stiteler, Thomas (1513) | Won 2-1 | +181525 |
| 4standard | 281 | Carlino, Steffen (1456) | Won 2-0 | +161541 |
| 5standard | 210 | Agrawal, Rishi (1549) | Won 2-1 | +191560 |
| 6standard | 163 | Leahy, Peter (1555) | Lost 0-2 | -181542 |
| 7standard | 303 | Van Vaals, Michael (1657) | Won 2-0 | +201562 |
| 8standard | 204 | Austin, Shawn (1695) | Won 2-0 | +201582 |
| 9standard | 56 | Sullano, Andrew (1918) | Lost 1-2 | -121570 |
| 10standard | 756 | He, Daniel (1489) | Lost 0-2 | -201550 |
| 11standard | 720 | Welsh, Matthew (1546) | Won 2-1 | +181568 |
| 12standard | 705 | Bowman, Jeremy (1649) | Lost 1-2 | -161552 |
| 13standard | 709 | Mincucci, Nick (1398) | Won 2-0 | +151567 |
| 14standard | 649 | Walsh, Brennan (1691) | Won 2-0 | +201587 |
| 15standard | 660 | Darby, Wyatt (1917) | Lost 1-2 | -121575 |
| average opponent: 1607record: 8-6 | new rating: 1575 | |||
| Grand Prix Detroit 2016 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 707 | Fontenot, Bryan (1567) | Lost 1-2 | -171483 |
| 2modern | 660 | O'Brien, Jonathan (1471) | Won 2-1 | +181501 |
| 3modern | 616 | Kirshbaum, Mike (1549) | Won 2-0 | +191520 |
| 4modern | 485 | Filak, John (1746) | Won 2-1 | +221542 |
| 5modern | 493 | Saucier, David (1625) | Lost 1-2 | -171525 |
| 6modern | 628 | Greshow, Tyler (1517) | Lost 0-2 | -181507 |
| 7modern | 831 | Duhamel, Erik (1490) | Lost 1-2 | -181489 |
| 8modern | 738 | Williams, Gabriel (1543) | Won 2-1 | +191508 |
| 9modern | 511 | Chambers, Judah (1499) | Won 2-0 | +181526 |
| average opponent: 1556record: 5-4 | new rating: 1526 | |||