Overfield, Jeffrey
Current rating: 1564
Record: 9-6-2
| Grand Prix Columbus 2019 (modern) | starting rating: 1549 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 119 | Larson, Mark (1550) | Won 2-0 | +181567 |
| 2modern | 95 | Wheeler, Shawn (1518) | Won 2-1 | +171584 |
| 3modern | 26 | Aiken, Jonathan (1464) | Lost 0-2 | -201564 |
| 4modern | 175 | Szal, Bogumil (1454) | Draw 1-1 | -21562 |
| 5modern | 147 | Barton, Gideon (1519) | Won 2-0 | +171579 |
| 6modern | 87 | Peterson, Nick (1545) | Lost 1-2 | -191560 |
| 7modern | 141 | Sikes, Roger (1603) | Won 2-0 | +191579 |
| 8modern | 96 | Knapp, Jace (1724) | Lost 0-2 | -151564 |
| average opponent: 1547record: 4-3-1 | new rating: 1564 | |||
| Grand Prix Columbus 2016 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 326 | Lu, Hsiu-Chi (1623) | Won 2-0 | +201520 |
| 2legacy | 76 | Anderson, Nathan (1722) | Lost 1-2 | -141506 |
| 3legacy | 668 | Morath, Eric (1503) | Lost 0-2 | -181488 |
| 4legacy | 613 | Standen, Chad (1478) | Won 2-0 | +181506 |
| 5legacy | 625 | Koch, Zachary (1661) | Won 2-1 | +201526 |
| 6legacy | 270 | Petrilli, Trevor (1699) | Won 2-1 | +221548 |
| 7legacy | 284 | Hanna, Andrew (1584) | Draw 1-1 | 01548 |
| 8legacy | 280 | Butcher, Elliot (1539) | Won 2-0 | +181566 |
| 9legacy | 183 | Kremen, Oran (1606) | Lost 1-2 | -171549 |
| average opponent: 1602record: 5-3-1 | new rating: 1549 | |||