Shaffer, Garrison
Current rating: 1407
| Grand Prix Portland 2019 (ELD standard) | starting rating: 1417 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 108 | Medina, Cameron (1481) | Won 2-0 | +191436 |
| 2standard | 57 | Stinson, Steven (1504) | Lost 1-2 | -171419 |
| 3standard | 197 | Villegas-Ibarra, Cristian (1502) | Lost 0-0 | -161403 |
| 4standard | 212 | Shumate, Brad (1485) | Won 2-1 | +191422 |
| 5standard | 143 | Gianatassio, Dominic (1474) | Lost 0-2 | -171405 |
| 6standard | 177 | Lewis, Robert (1389) | Won 2-0 | +181423 |
| 7standard | 134 | Lovett, Sara (1548) | Lost 1-2 | -161407 |
| top | average opponent: 1483record: 3-4 | new rating: 1407 | ||
| Grand Prix Portland 2017 (XLN standard) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 445 | Kiene, Thomas (1716) | Lost 0-1 | -131451 |
| 2standard | 540 | Cabasa, Rheney (1482) | Lost 1-2 | -181433 |
| 3standard | 773 | Huey, Jonah (1462) | Won 2-0 | +191452 |
| 4standard | 578 | Barnes, James (1479) | Lost 1-2 | -181434 |
| 5standard | 688 | Heckathorn, Darby (1468) | Lost 0-2 | -171417 |
| top | average opponent: 1521record: 1-4 | new rating: 1417 | ||
| Grand Prix Las Vegas 2015 (2) (MM2 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 362 | DeVine, Richard (1500) | Lost 0-2 | -181482 |
| 2sealed | 471 | Blanchard, Cody (1498) | Lost 0-2 | -181464 |
| 3sealed | 569 | Antunes, Antonio (1463) | Lost 1-2 | -181446 |
| 4sealed | 505 | Brumbaugh, Nathan (1445) | Won 2-1 | +181464 |
| top | average opponent: 1477record: 1-3 | new rating: 1464 | ||