Herrera, Alfredo
Current rating: 1476
Record: 12-15
| Grand Prix Louisville 2017 (legacy) | starting rating: 1509 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 491 | Usary, Marsh (1685) | Lost 1-2 | -151494 |
| 2legacy | 850 | James, Rajah (1448) | Won 2-0 | +181512 |
| 3legacy | 865 | Vigiano, Nicholas (1523) | Lost 0-2 | -181494 |
| 4legacy | 899 | Wen, Brandon (1497) | Lost 0-2 | -181476 |
| top | average opponent: 1538record: 1-3 | new rating: 1476 | ||
| Grand Prix Charlotte 2016 (modern) | starting rating: 1496 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 646 | Setree, Cody (1390) | Won 2-0 | +161512 |
| 2modern | 451 | Silverberg, Ian (1518) | Won 2-0 | +181530 |
| 3modern | 220 | Burnett, Kai (1939) | Lost 1-2 | -111519 |
| 4modern | 378 | White, Jon (1656) | Lost 1-2 | -151504 |
| 5modern | 692 | Riley, Nevin (1470) | Won 2-0 | +171521 |
| 6modern | 354 | Bianchi, Alex (1871) | Lost 0-2 | -121509 |
| top | average opponent: 1641record: 3-3 | new rating: 1509 | ||
| Grand Prix Charlotte 2015 (modern) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 514 | Gregory, Justin (1446) | Lost 0-2 | -181452 |
| 2modern | 474 | Miller, Dan (1481) | Lost 0-2 | -181434 |
| 3modern | 643 | Clark, Donald (1430) | Won 2-0 | +181452 |
| 4modern | 578 | Kelly, Ozzy (1482) | Won 2-1 | +191471 |
| 5modern | 472 | Delano, Jonathan (1779) | Won 2-1 | +231494 |
| 6modern | 360 | Jones, Eric (1468) | Won 2-1 | +181512 |
| 7modern | 335 | Hawthorne, Bart (1631) | Lost 0-2 | -161496 |
| top | average opponent: 1531record: 4-3 | new rating: 1496 | ||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1506 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 335 | Dexter, Marcus (1500) | Lost 1-2 | -181488 |
| 2sealed | 387 | Beckham, Andrew (1482) | Won 2-0 | +181506 |
| 3sealed | 357 | Wetmore, Mike (1555) | Lost 0-2 | -171489 |
| 4sealed | 489 | Cressy, Brandon (1446) | Lost 0-2 | -191470 |
| top | average opponent: 1496record: 1-3 | new rating: 1470 | ||
| Grand Prix Nashville 2010 (SOM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 507 | Johnson, Jason C (1500) | Won 2-0 | +181518 |
| 2sealed | 417 | Torgerson, Leif (1572) | Won 2-1 | +191537 |
| 3sealed | 513 | Padgett, Ronald D (1535) | Won 2-1 | +181555 |
| 4sealed | 418 | Raney, Tom (1806) | Lost 1-2 | -141541 |
| 5sealed | 496 | Holland, Kitt (1604) | Lost 1-2 | -161525 |
| 6sealed | 597 | Kopf, Joe W (1519) | Lost 1-2 | -191506 |
| top | average opponent: 1589record: 3-3 | new rating: 1506 | ||