Pierce, David
Current rating: 1457
Record: 13-17-1
| Regional Championships Dallas 2023 (pioneer) | starting rating: 1458 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 520 | DiGiacomo, Daniel (1358) | Won 2-0 | +161474 |
| 2pioneer | 62 | Berman, Paul (1611) | Lost 0-2 | -151459 |
| 3pioneer | 300 | Johnson, Blaine (1701) | Won 2-0 | +221481 |
| 4pioneer | 98 | Moore, Spencer (1659) | Won 2-1 | +221503 |
| 5pioneer | 139 | Prost, Andrejs (1885) | Lost 0-2 | -121491 |
| 6pioneer | 259 | Aismoto, Leonardo (1534) | Lost 1-2 | -171474 |
| 7pioneer | 238 | Hays, Owen (1545) | Lost 0-2 | -171457 |
| top | average opponent: 1613record: 3-4 | new rating: 1457 | ||
| Grand Prix Portland 2019 (ELD standard) | starting rating: 1515 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 102 | Tryggestad, David (1446) | Lost 0-2 | -201495 |
| 2standard | 155 | Mills, Bobby (1480) | Lost 0-2 | -181477 |
| 3standard | 215 | Dunlap, Sam (1430) | Lost 0-0 | -191458 |
| top | average opponent: 1452record: 0-3 | new rating: 1458 | ||
| Grand Prix Vancouver 2018 (UMA limited) | starting rating: 1452 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 151 | Seefeldt, Steven (1500) | Draw 1-1 | +11453 |
| 2sealed | 213 | Vestergaard, Trevor (1523) | Won 2-0 | +191472 |
| 3sealed | 188 | Beausoleil, Justin (1457) | Lost 0-2 | -181454 |
| 4sealed | 271 | MacDonald, Aaron (1392) | Won 2-0 | +171471 |
| 5sealed | 189 | Arnold, Chris (1661) | Won 2-0 | +211492 |
| 6sealed | 118 | Li, Wayne (1603) | Lost 1-2 | -161476 |
| 7sealed | 178 | Rogers, Tracy (1518) | Won 2-1 | +191495 |
| 8sealed | 123 | Jackson, Derek (1592) | Won 2-0 | +201515 |
| top | average opponent: 1531record: 5-2-1 | new rating: 1515 | ||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 99 | Harberg, Nicholas (1467) | Won 2-1 | +171487 |
| 2standard | 313 | Whalen, Mike (1518) | Lost 0-2 | -171470 |
| 3standard | 324 | Collins, Eamonn (1571) | Lost 0-2 | -161454 |
| 4standard | 657 | Morrell, Sean (1482) | Won 2-0 | +181472 |
| 5standard | 553 | Smith, RJ (1441) | Lost 1-2 | -181454 |
| 6standard | 495 | Gies, Andrew (1485) | Won 2-0 | +181472 |
| 7standard | 426 | Green, Marcell (1339) | Lost 1-2 | -201452 |
| top | average opponent: 1472record: 3-4 | new rating: 1452 | ||
| Grand Prix Portland 2016 (EMN standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 357 | Olsen, Erik (1579) | Won 2-1 | +191519 |
| 2standard | 127 | Calhoun, Robbie (1731) | Lost 1-2 | -141505 |
| 3standard | 453 | Freden, Wyatt (1575) | Won 2-1 | +201525 |
| 4standard | 348 | Bruce, Andrew (1513) | Lost 1-2 | -191506 |
| 5standard | 561 | Paterson, Dean (1471) | Lost 1-2 | -181488 |
| 6standard | 550 | Andorf, Andrew (1480) | Lost 0-2 | -181470 |
| top | average opponent: 1558record: 2-4 | new rating: 1470 | ||