Estell, Brock
Current rating: 1590
Record: 42-35-1
| Grand Prix Richmond 2017 (AKH limited) | starting rating: 1600 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 218 | Sokola, Robert (1518) | Lost 1-2 | -191581 |
| 3sealed | 609 | Giblin, Russell (1591) | Won 2-1 | +181599 |
| 4sealed | 406 | Fasano, Joe (1784) | Won 2-1 | +211620 |
| 5sealed | 304 | Stiles, Kevin (1598) | Won 2-0 | +181638 |
| 6sealed | 220 | Shenhar, Shahar (1848) | Lost 1-2 | -141624 |
| 7sealed | 274 | D'Ambrose, Nicolas (1828) | Lost 0-2 | -141610 |
| 8sealed | 317 | Petroski, Michael (1520) | Lost 0-2 | -201590 |
| top | average opponent: 1670record: 3-4 | new rating: 1590 | ||
| Grand Prix Indianapolis 2016 (modern) | starting rating: 1520 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 399 | Fairchild, Stephen (1491) | Won 2-0 | +181538 |
| 3modern | 363 | Sledz, Richie (1455) | Won 2-1 | +161554 |
| 4modern | 142 | Arthurs, Marshall (1728) | Lost 0-2 | -151539 |
| 5modern | 132 | Long, Jennifer (1568) | Won 2-0 | +191558 |
| 6modern | 123 | Wade, Bryan (1554) | Won 2-1 | +181576 |
| 7modern | 166 | Hartman, Reed (1789) | Lost 1-2 | -141562 |
| 8modern | 142 | Garner, David (1568) | Won 2-1 | +181580 |
| 9modern | 142 | Mork, Elliot (1549) | Won 2-0 | +171597 |
| 10modern | 910 | Le-Dang, Tan (1609) | Lost 1-2 | -181579 |
| 11modern | 1031 | Skorik, Andrew (1785) | Lost 1-2 | -141565 |
| 12modern | 1013 | Strange, Alex (1558) | Lost 0-2 | -181547 |
| 13modern | 1026 | Allotta, Jeff (1531) | Won 2-1 | +181565 |
| 14modern | 1015 | Smith, Alex (1581) | Won 2-1 | +181583 |
| 15modern | 964 | Meshell, Richard (1553) | Won 2-0 | +171600 |
| top | average opponent: 1594record: 9-5 | new rating: 1600 | ||
| Grand Prix Charlotte 2016 (modern) | starting rating: 1561 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 35 | Thiebaut, Donald (1481) | Won 2-0 | +161577 |
| 3modern | 211 | Hyden, Garet (1500) | Won 2-0 | +171594 |
| 4modern | 99 | Rill, Eric (1738) | Lost 0-2 | -151579 |
| 5modern | 308 | Hudson, Michael (1309) | Lost 1-2 | -231556 |
| 6modern | 321 | Borakove, Steven (1574) | Lost 1-2 | -181538 |
| 7modern | 669 | Patton, David (1544) | Lost 0-2 | -181520 |
| top | average opponent: 1524record: 2-4 | new rating: 1520 | ||
| Grand Prix Detroit 2016 (modern) | starting rating: 1569 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 567 | Vaugeois, Christophe (1500) | Lost 0-2 | -191550 |
| 2modern | 1029 | Smith, Andrew J (1442) | Won 2-1 | +161566 |
| 3modern | 923 | Girard, William W (1536) | Lost 1-2 | -191547 |
| 4modern | 973 | Smith, Kyle (1530) | Won 2-1 | +181565 |
| 5modern | 585 | Hartman, Michael (1504) | Won 2-0 | +171582 |
| 6modern | 482 | Ouimet, Guillaume (1617) | Won 2-1 | +191601 |
| 7modern | 380 | Selim, Paul (1505) | Lost 1-2 | -201581 |
| 8modern | 542 | Ivey, Greg (1474) | Lost 1-2 | -201561 |
| top | average opponent: 1514record: 4-4 | new rating: 1561 | ||
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1654 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 425 | Lao, Benjamin (1524) | Lost 0-2 | -211633 |
| 2modern | 1008 | Erickson, Zachery (1465) | Lost 0-2 | -211612 |
| 3modern | 1165 | Beardsley, Jay (1464) | Lost 0-2 | -201592 |
| 4modern | 1205 | Meyers, Christian (1336) | Lost 0-2 | -231569 |
| top | average opponent: 1447record: 0-4 | new rating: 1569 | ||
| Grand Prix Cincinnati 2014 (BNG standard) | starting rating: 1615 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 51 | Marley, William (1461) | Won 2-0 | +151630 |
| 2standard | 303 | Basham, Levi (1486) | Lost 0-2 | -201610 |
| 3standard | 328 | Hunt, Bill (1499) | Won 2-0 | +161626 |
| 4standard | 324 | Wade, Samuel (1490) | Won 2-0 | +151641 |
| 5standard | 191 | Tragos, Peter (1572) | Lost 1-2 | -191622 |
| 6standard | 441 | Neitzelt, Nicholas (1506) | Won 2-0 | +161638 |
| 7standard | 155 | Warr, Clement (1518) | Won 2-0 | +161654 |
| 8standard | 153 | Berlingieri, Anthony (1850) | Won 2-0 | +211675 |
| 9standard | 64 | Farney, Matthew (1482) | Lost 0-2 | -211654 |
| top | average opponent: 1540record: 6-3 | new rating: 1654 | ||
| Grand Prix Indianapolis 2008 (SHM limited) | starting rating: 1570 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 78 | Patrick, Jesse (1507) | Won 2-0 | +171587 |
| 2sealed | 173 | Mason, Christopher (1500) | Lost 0-2 | -201567 |
| 3sealed | 243 | East, Brian (1500) | Won 2-1 | +171584 |
| 4sealed | 304 | Walsh, Sean L (1478) | Won 2-0 | +161600 |
| 5sealed | 130 | Boeckmann, Trevor (1540) | Won 2-0 | +171617 |
| 6sealed | 131 | Davidson, Alec (1555) | Won 2-1 | +171634 |
| 7sealed | 37 | Jolin, Gregory (1706) | Won 2-1 | +191653 |
| 8sealed | 18 | Saylor, David (1621) | Lost 0-2 | -191634 |
| 9sealed | 53 | Tidd, Mark (1560) | Lost 0-2 | -191615 |
| top | average opponent: 1552record: 6-3 | new rating: 1615 | ||
| Grand Prix Philadelphia 2008 (extended) | starting rating: 1595 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 18 | Huffnagle, Nathan (1488) | Won 2-0 | +161611 |
| 2extended | 146 | Sukenik, Sara (1496) | Won 2-1 | +161627 |
| 3extended | 107 | Vitullo, Joshua (1536) | Lost 0-2 | -191608 |
| 4extended | 291 | McGregor, Duncan (1622) | Lost 1-2 | -181590 |
| 5extended | 267 | Alexander, Christopher (1475) | Lost 0-2 | -201570 |
| top | average opponent: 1523record: 2-3 | new rating: 1570 | ||
| Grand Prix Montreal 2007 (Time Spiral block) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 2block | 9 | Hart, Ben (1518) | Won 2-1 | +181534 |
| 3block | 51 | Lachance-Poitras, David (1536) | Won 2-0 | +181552 |
| 4block | 3 | Putnam, Taylor (1641) | Lost 1-2 | -161536 |
| 5block | 104 | Anderson, Phil (1557) | Won 2-0 | +181554 |
| 6block | 48 | Siu, Brian (1647) | Won 2-0 | +201574 |
| 7block | 25 | Afshar, Sina (1572) | Won 2-0 | +181592 |
| 8block | 14 | DeTora, Melissa (1710) | Lost 0-0 | -161576 |
| 9block | 31 | Jolin, Gregory (1660) | Won 0-0 | +191595 |
| top | average opponent: 1605record: 6-2 | new rating: 1595 | ||
| Grand Prix Columbus 2007 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 2 | Mills, Colin (1500) | Won 2-0 | +181518 |
| 2legacy | 1 | Gamble, Eddie (1464) | Lost 0-2 | -191499 |
| 3legacy | 227 | Allman, William (1500) | Draw 1-1 | 01499 |
| 4legacy | 277 | Mullins, E (1500) | Won 2-0 | +181517 |
| 5legacy | 196 | wallace, bryan (1519) | Won 2-0 | +181535 |
| 6legacy | 128 | Pringle, Steve (1517) | Lost 0-2 | -181517 |
| 7legacy | 180 | Paster, Kyle (1517) | Won 2-0 | +181535 |
| 8legacy | 123 | Krieger, Jesse (1489) | Lost 0-2 | -191516 |
| top | average opponent: 1501record: 4-3-1 | new rating: 1516 | ||