Brock, Joshua
Current rating: 1304
Record: 11-27-4
| Regional Championships Dallas 2023 (pioneer) | starting rating: 1366 | |||
| round | table | opponent (rating) | result | Δrating |
| 1pioneer | 446 | Hayes, Ryan (1728) | Won 2-1 | +241390 |
| 2pioneer | 176 | Strunk, Josh (1506) | Lost 1-2 | -161374 |
| 3pioneer | 360 | Goodwin, Luke (1811) | Lost 1-2 | -101364 |
| 4pioneer | 465 | Sklar, Jacob (1591) | Lost 1-2 | -141350 |
| 5pioneer | 421 | Winkle, Jacob (1465) | Lost 1-2 | -161334 |
| 6pioneer | 460 | Roosa, Zach (1613) | Lost 0-2 | -131321 |
| 7pioneer | 395 | Taylor, Robert (1351) | Lost 0-2 | -171304 |
| top | average opponent: 1581record: 1-6 | new rating: 1304 | ||
| Grand Prix Pittsburgh 2017 (AER standard) | starting rating: 1377 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 253 | Stewart, Nyl (1500) | Won 2-0 | +201397 |
| 2standard | 279 | Gorski, Andrew (1518) | Won 2-0 | +201417 |
| 3standard | 331 | Koepke, Devin (1742) | Lost 0-2 | -121405 |
| 4standard | 358 | Abraham, Donivan (1610) | Lost 0-2 | -141391 |
| 5standard | 431 | Whites, Marc (1589) | Draw 1-1 | +31394 |
| 6standard | 428 | Castillo, Dominic (1485) | Lost 1-2 | -161378 |
| 7standard | 484 | Bailey, Tyler (1418) | Lost 1-2 | -171361 |
| 8standard | 457 | Hurst, Alex (1541) | Won 2-0 | +211382 |
| 9standard | 389 | Gabrielle, Estellise (1495) | Lost 0-2 | -161366 |
| top | average opponent: 1544record: 3-5-1 | new rating: 1366 | ||
| Grand Prix Pittsburgh 2016 (SOI standard) | starting rating: 1417 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 77 | Gee, Seth (1500) | Lost 1-2 | -161401 |
| 2standard | 413 | Cavage, Andy (1453) | Won 2-0 | +191420 |
| 3standard | 409 | Jackson, Brian (1540) | Won 2-0 | +201440 |
| 4standard | 231 | Davis, Randy (1713) | Lost 1-2 | -131427 |
| 5standard | 454 | Wilson, Edward (1560) | Lost 0-2 | -161411 |
| 6standard | 544 | Dutko, Cody (1477) | Won 2-0 | +191430 |
| 7standard | 409 | Kotscharjan, Greg (1407) | Lost 1-2 | -181412 |
| 8standard | 397 | Bishop, Jesse (1393) | Lost 0-2 | -181394 |
| 9standard | 382 | Bonillas, Josh (1464) | Lost 0-2 | -171377 |
| top | average opponent: 1501record: 3-6 | new rating: 1377 | ||
| Grand Prix Los Angeles 2016 (modern) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 362 | Sherwood, Craig (1576) | Won 2-1 | +201468 |
| 2modern | 304 | Milton, Rhianna (1506) | Lost 0-2 | -171451 |
| 3modern | 895 | Garcia, Eduardo (1471) | Draw 1-1 | 01451 |
| 4modern | 721 | Slawinski, Albert (1498) | Draw 1-1 | +11452 |
| 5modern | 843 | Lopez, Mason (1482) | Draw 1-1 | +11453 |
| 6modern | 823 | Phillips, Johnathan (1447) | Lost 0-2 | -181435 |
| 7modern | 766 | Frederick, Ian (1465) | Lost 0-2 | -181417 |
| top | average opponent: 1492record: 1-3-3 | new rating: 1417 | ||
| Grand Prix Detroit 2016 (modern) | starting rating: 1448 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 409 | Sampson, Joshua (1543) | Won 2-1 | +201468 |
| 4modern | 2 | Ashley, Nathan (1583) | Lost 1-2 | -161452 |
| 5modern | 409 | Pigeon, Adam (1500) | Won 2-1 | +191471 |
| 6modern | 95 | Manfield, Seth (2025) | Won 2-1 | +271498 |
| 7modern | 46 | Teagan, Kyle (1524) | Lost 1-2 | -181480 |
| 8modern | 278 | Bordt, Jeremy (1567) | Lost 0-2 | -161464 |
| 9modern | 486 | Ivey, Brenna (1577) | Lost 1-2 | -161448 |
| top | average opponent: 1617record: 3-4 | new rating: 1448 | ||
| Grand Prix Dallas-Fort Worth 2011 (MBS standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 198 | Borowicz, Brandon (1614) | Lost 0-2 | -161484 |
| 2standard | 346 | Zandi, Lawson (1482) | Lost 1-2 | -181466 |
| 3standard | 443 | Black, Adam (1463) | Lost 0-2 | -181448 |
| top | average opponent: 1520record: 0-3 | new rating: 1448 | ||