Mattern, Jake
Current rating: 1538
Record: 5-4
| Grand Prix Miami 2015 (FRF standard) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 406 | Huber, Katrina (1500) | Won 2-0 | +181500 |
| 2standard | 309 | Reed, Milton T (1518) | Won 2-0 | +191519 |
| 3standard | 148 | Crescenti, Christopher (1807) | Lost 0-2 | -131506 |
| 4standard | 322 | Bargo, Craig (1627) | Won 2-1 | +201526 |
| 5standard | 85 | DeRos, Nick (1501) | Won 2-0 | +181544 |
| 6standard | 64 | Chapin, Patrick (1987) | Won 2-1 | +251569 |
| 7standard | 47 | Lebedowicz, Osyp (1798) | Lost 0-2 | -141555 |
| 8standard | 107 | Melendez, David (1622) | Lost 1-2 | -171538 |
| average opponent: 1670record: 5-3 | new rating: 1538 | |||
| Grand Prix Orlando 2014 (KTK limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 575 | Dorris, Tyler (1500) | Lost 0-2 | -181482 |
| record: 0-1 | new rating: 1482 | |||