Birberick, Donald
Current rating: 1538
Record: 8-6
| Grand Prix Las Vegas 2019 (modern) (modern) | starting rating: 1539 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 476 | Hoadley, Joseph (1501) | Won 2-0 | +171556 |
| 2modern | 350 | DeJesus, Brandon (1510) | Lost 0-2 | -191537 |
| 3modern | 655 | Jones, Brandon (1567) | Won 2-0 | +191556 |
| 4modern | 514 | Resor, Ian (1526) | Lost 1-2 | -191537 |
| 5modern | 442 | Liu, Victor (1604) | Won 2-1 | +191556 |
| 6modern | 342 | Dewey, Will (1531) | Lost 1-2 | -181538 |
| average opponent: 1540record: 3-3 | new rating: 1538 | |||
| Grand Prix Las Vegas 2018 (modern) (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 190 | Pickett, Jeffrey (1411) | Lost 0-2 | -201480 |
| 2modern | 648 | Gleisner, Brandon (1393) | Won 2-0 | +171497 |
| 3modern | 817 | Mathews, Andrew (1613) | Won 2-0 | +201517 |
| 4modern | 490 | Neiss, Cory (1467) | Lost 0-2 | -191498 |
| 5modern | 622 | Feeman, Dylan (1742) | Won 2-1 | +221520 |
| 6modern | 608 | Dominguez, Luis (1486) | Won 2-0 | +181538 |
| 7modern | 388 | Tapia, Julio (1534) | Won 2-1 | +181556 |
| 8modern | 171 | Clingan, Casey (1610) | Lost 1-2 | -171539 |
| average opponent: 1532record: 5-3 | new rating: 1539 | |||