Pierce, Herbert
Current rating: 1417
Record: 2-7-1
| Grand Prix Reno 2020 (THB limited) | starting rating: 1446 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 156 | Rueckl, Joey (1515) | Won 2-1 | +191465 |
| 2sealed | 129 | Marshello, Donald (1434) | Draw 1-1 | -11464 |
| 3sealed | 153 | Smith, Austin J (1518) | Lost 1-2 | -171447 |
| 4sealed | 219 | Stafford, Matthew (1396) | Won 2-0 | +171464 |
| 5sealed | 147 | Candelario, Derek (1718) | Lost 0-2 | -131451 |
| 6sealed | 189 | Andrews, Derek (1512) | Lost 0-2 | -171434 |
| 7sealed | 20 | Eckenberg, Luke (1495) | Lost 0-2 | -171417 |
| average opponent: 1513record: 2-4-1 | new rating: 1417 | |||
| Grand Prix Las Vegas 2018 (limited) (DOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 301 | Levy, Justin (1557) | Lost 0-2 | -171483 |
| 2sealed | 591 | Geary, Everett (1431) | Lost 0-2 | -191464 |
| 3sealed | 765 | Bachman, Jacob (1433) | Lost 0-2 | -181446 |
| average opponent: 1474record: 0-3 | new rating: 1446 | |||