Costa, Joseph
Current rating: 1594
Record: 19-14
| Grand Prix Albuquerque 2016 (SOI limited) | starting rating: 1638 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 358 | Pehrson, Steven (1598) | Lost 0-2 | -191619 |
| 2sealed | 383 | White, Joeseph (1481) | Won 2-0 | +161635 |
| 3sealed | 416 | Castillo, Zaryn (1543) | Lost 0-2 | -201615 |
| 4sealed | 439 | Gaccetta, Domonic (1461) | Lost 0-2 | -211594 |
| top | average opponent: 1521record: 1-3 | new rating: 1594 | ||
| Grand Prix Las Vegas 2015 (2) (MM2 limited) | starting rating: 1467 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 473 | Lindner, Dylan (1500) | Lost 1-2 | -181449 |
| 2sealed | 360 | Lee Kwai, Josh (1507) | Won 2-0 | +201469 |
| 3sealed | 419 | Fazio, Kristen (1462) | Won 2-1 | +171486 |
| 4sealed | 236 | Malasig, Gabriel (1521) | Won 2-0 | +191505 |
| 5sealed | 143 | Maddox, Natalie (1536) | Won 2-0 | +191524 |
| 6sealed | 61 | Jones, Zack (1558) | Won 2-0 | +181542 |
| 7sealed | 54 | Shipley, Harry (1449) | Lost 1-2 | -191523 |
| 8sealed | 87 | Black, James (1660) | Won 2-1 | +201543 |
| 9sealed | 94 | Harrison, Mike (1591) | Won 2-1 | +191562 |
| 10draft | 59 | Levy, Justin (1642) | Won 2-1 | +191581 |
| 11draft | 32 | Mouton, Jean-Paul (1636) | Won 2-0 | +191600 |
| 12draft | 59 | Brown, Gavin (1511) | Lost 0-2 | -191581 |
| 13draft | 163 | Sloan, Shawn (1569) | Won 2-1 | +171598 |
| 14draft | 13 | Burns, Jonathan (1682) | Won 2-0 | +201618 |
| 15draft | 22 | Scheuermann, Alex (1713) | Won 2-1 | +201638 |
| top | average opponent: 1569record: 12-3 | new rating: 1638 | ||
| Grand Prix Los Angeles 2014 (KTK standard) | starting rating: 1486 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 29 | Malka, Ari (1487) | Lost 0-2 | -181468 |
| 2standard | 619 | Easton, Matt (1482) | Lost 0-2 | -181450 |
| 3standard | 784 | Birch, Rhonda (1467) | Won 2-0 | +181468 |
| 4standard | 732 | Manary, Faith (1333) | Won 2-0 | +161484 |
| 5standard | 488 | Siu, William (1501) | Won 2-1 | +181502 |
| 6standard | 451 | Yap, Ethan (1518) | Lost 1-2 | -171485 |
| 7standard | 455 | West, Michael (1503) | Lost 0-2 | -181467 |
| top | average opponent: 1470record: 3-4 | new rating: 1467 | ||
| Grand Prix Sacramento 2014 (THS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 84 | Harris, Andrew (1554) | Won 2-0 | +191519 |
| 3sealed | 50 | Boyett, Donald (1615) | Won 2-1 | +201539 |
| 4sealed | 28 | Goodkind, Grant (1553) | Lost 0-2 | -181521 |
| 5sealed | 148 | Bailey, A.J. (1595) | Won 2-0 | +191540 |
| 6sealed | 116 | Seibert, Joel (1528) | Lost 0-2 | -181522 |
| 7sealed | 138 | Puzon Jr, Gregory (1504) | Lost 0-2 | -181504 |
| 8sealed | 190 | Rubin, Aaron 2 (1505) | Lost 0-2 | -181486 |
| top | average opponent: 1550record: 3-4 | new rating: 1486 | ||