Brown, Mark
Current rating: 1322
Record: 20-38-1
| Grand Prix Washington DC 2019 (MH1 limited) | starting rating: 1292 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 366 | Baker, Brian (1373) | Won 2-1 | +201312 |
| 2sealed | 218 | Ronquillo, Voltaire (1735) | Lost 0-0 | -111301 |
| 3sealed | 315 | Evans, Chris (1500) | Won 2-1 | +211322 |
| 4sealed | 242 | Beaman, PJ (1573) | Lost 0-2 | -131309 |
| 5sealed | 276 | Kurtzman, Etai (1543) | Won 2-0 | +221331 |
| 6sealed | 255 | Purcell, Luke (1844) | Lost 1-2 | -91322 |
| top | average opponent: 1595record: 3-3 | new rating: 1322 | ||
| Grand Prix Washington DC 2017 (HOU standard) | starting rating: 1300 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 93 | Wenrick, Kaleb (1500) | Lost 1-2 | -151285 |
| 2standard | 490 | Butchko, John (1433) | Lost 0-2 | -151270 |
| 3standard | 758 | Phillips, Grant (1484) | Lost 0-2 | -141256 |
| 4standard | 739 | Hernandez, Victor [USA] (1451) | Won 2-0 | +211277 |
| 5standard | 626 | Burgher, James (1462) | Won 2-1 | +221299 |
| 6standard | 579 | Arnold, Andrew (1549) | Lost 1-2 | -141285 |
| 7standard | 552 | Owens, Kaine (1464) | Won 2-0 | +211306 |
| 8standard | 466 | Walters, Steven (1508) | Lost 0-2 | -141292 |
| top | average opponent: 1481record: 3-5 | new rating: 1292 | ||
| Grand Prix Richmond 2017 (AKH limited) | starting rating: 1341 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 392 | Nerem, Perry (1500) | Lost 1-2 | -151326 |
| 2sealed | 484 | Goldman, Gabriel (1429) | Lost 1-2 | -161310 |
| 3sealed | 715 | McAvinue, Kyle (1483) | Lost 1-2 | -151295 |
| 4sealed | 742 | Vachon, David (1402) | Lost 0-2 | -161279 |
| 5sealed | 700 | Mason, Matthew A (1425) | Won 2-0 | +211300 |
| top | average opponent: 1448record: 1-4 | new rating: 1300 | ||
| Grand Prix New Jersey 2017 (std) (AER standard) | starting rating: 1355 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 453 | Hines, Robert (1462) | Won 2-0 | +201375 |
| 2standard | 358 | Russell, Griffin (1479) | Won 2-0 | +201395 |
| 3standard | 158 | Plott, Zachary (1500) | Lost 1-2 | -161379 |
| 4standard | 466 | Gray, David (1446) | Lost 0-2 | -171362 |
| 5standard | 424 | Petre, Evan (1891) | Lost 1-2 | -91353 |
| 6standard | 564 | Lynch, Corey (1570) | Lost 1-2 | -141339 |
| 7standard | 621 | Densen, Todd (1471) | Draw 1-1 | +21341 |
| top | average opponent: 1546record: 2-4-1 | new rating: 1341 | ||
| Grand Prix Pittsburgh 2017 (AER standard) | starting rating: 1394 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 40 | Dunn, Ryan 1615 (1466) | Won 2-1 | +191413 |
| 2standard | 112 | Helbig, Drew (1736) | Lost 0-2 | -121401 |
| 3standard | 435 | Bullock, Jordan (1576) | Lost 0-2 | -151386 |
| 4standard | 555 | Coghlan, Brian (1574) | Lost 0-2 | -141372 |
| 5standard | 589 | Cain, Raymond (1462) | Lost 0-2 | -171355 |
| top | average opponent: 1563record: 1-4 | new rating: 1355 | ||
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1425 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 854 | Lucarelli, Brian (1500) | Won 2-0 | +201445 |
| 2modern | 271 | Betuel, Kevin (1518) | Lost 0-2 | -171428 |
| 3modern | 1057 | Stahl, Eric (1501) | Lost 0-2 | -171411 |
| 4modern | 1151 | Puzak, Kevin (1442) | Lost 0-2 | -171394 |
| top | average opponent: 1490record: 1-3 | new rating: 1394 | ||
| Grand Prix Richmond 2014 (modern) | starting rating: 1396 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 119 | Nauman, Bryan (1500) | Lost 1-2 | -161380 |
| 2modern | 344 | Johnson, Cory (1481) | Won 2-0 | +191399 |
| 3modern | 387 | Palmer, Keith (1544) | Won 2-0 | +211420 |
| 4modern | 220 | Williams, Jacob D (1502) | Won 2-1 | +201440 |
| 5modern | 123 | Gildea, Robert (1554) | Lost 1-2 | -161424 |
| 6modern | 218 | Palovich, Chris (1472) | Won 2-1 | +191443 |
| 7modern | 153 | Bargo, Craig (1496) | Lost 0-2 | -181425 |
| top | average opponent: 1507record: 4-3 | new rating: 1425 | ||
| Grand Prix Indianapolis 2012 (legacy) | starting rating: 1396 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 111 | Rogerson, Ian (1685) | Lost 0-2 | -131383 |
| 2legacy | 467 | Meredith, Gareth E (1482) | Lost 0-2 | -161367 |
| 3legacy | 468 | Crook, Matthew (1463) | Won 2-0 | +201387 |
| 4legacy | 490 | Nelson, Patrick (1482) | Won 2-0 | +191406 |
| 5legacy | 465 | Artigue, Michall (1504) | Lost 1-2 | -161390 |
| 6legacy | 400 | Chatman, Evan (1481) | Won 2-0 | +201410 |
| 7legacy | 298 | Smith, Lucas [USA] (1457) | Won 2-0 | +191429 |
| 8legacy | 234 | Plattenburg, Brian (1507) | Lost 0-2 | -171412 |
| 9legacy | 224 | DeVooght, Jeremey R (1499) | Lost 1-2 | -161396 |
| top | average opponent: 1507record: 4-5 | new rating: 1396 | ||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 776 | Villamizar, Daniel (1498) | Lost 0-2 | -181447 |
| 3standard | 901 | Baker, Shane (1500) | Lost 0-2 | -171430 |
| 4standard | 976 | Cook, Joel (1484) | Lost 0-2 | -171413 |
| 5standard | 979 | Pinkney, Matt (1464) | Lost 0-2 | -171396 |
| top | average opponent: 1486record: 0-4 | new rating: 1396 | ||
| Grand Prix New Orleans 2001 (INV limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 64 | Bernard, Ben (1485) | Won 2-0 | +181518 |
| 2sealed | 74 | McGlinchey, Mike (1484) | Lost 1-2 | -191499 |
| 3sealed | 141 | Mezzic, Jason (1500) | Lost 1-2 | -181481 |
| 4sealed | 172 | Landriz, Erik (1557) | Lost 0-2 | -161465 |
| top | average opponent: 1506record: 1-3 | new rating: 1465 | ||