Walker, Matthew [USA]
Current rating: 1487
Record: 31-34-1
| Grand Prix Austin 2020 (modern) | starting rating: 1455 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 138 | Prachick, Jennifer (1500) | Won 2-0 | +181473 |
| 2modern | 106 | Bates, Adam (1587) | Lost 1-2 | -151458 |
| 3modern | 264 | Benson, Austin (1436) | Won 2-0 | +171475 |
| 4modern | 104 | Gambrell, Jonathan (1521) | Won 2-1 | +191494 |
| 5modern | 89 | Cole, Conor (1748) | Won 2-0 | +231517 |
| 6modern | 53 | Schulzetenberg, Todd (1616) | Won 2-1 | +191536 |
| 7modern | 15 | Finn, Maverick (1581) | Won 2-1 | +191555 |
| 8modern | 14 | Nagro, Jacob (1917) | Lost 0-2 | -111544 |
| 9modern | 68 | Fusco, Roman (1728) | Lost 1-2 | -151529 |
| 10modern | 148 | Jankovsky, Marshall (1830) | Lost 0-0 | -131516 |
| 11modern | 143 | Nguyen, Justin (1843) | Lost 0-2 | -121504 |
| 13modern | 141 | Strausman, Shea (1560) | Lost 0-2 | -171487 |
| top | average opponent: 1656record: 6-6 | new rating: 1487 | ||
| Grand Prix Dallas-Fort Worth 2019 (modern) | starting rating: 1424 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 357 | Mayall, Courtney (1500) | Won 2-1 | +191443 |
| 2modern | 73 | Case, Adam (1531) | Won 2-0 | +201463 |
| 3modern | 43 | Zagrev, Zachariah (1536) | Lost 0-2 | -171446 |
| 4modern | 358 | Amos, Brad (1417) | Won 2-1 | +181464 |
| 5modern | 136 | Goslar, Matthew (1678) | Won 2-1 | +211485 |
| 6modern | 132 | Lowry, William (1685) | Lost 1-2 | -141471 |
| 7modern | 90 | Nichols, Zachery (1560) | Lost 0-2 | -161455 |
| top | average opponent: 1558record: 4-3 | new rating: 1455 | ||
| Grand Prix Denver 2017 (HOU standard) | starting rating: 1458 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 3 | Gregory, Ryan (1477) | Lost 1-2 | -181440 |
| 2standard | 316 | Pfeffer, Abe (1482) | Won 2-1 | +191459 |
| 3standard | 443 | Coltran, Marty (1405) | Lost 0-2 | -191440 |
| 4standard | 389 | Laney, Ryan (1499) | Won 2-1 | +191459 |
| 5standard | 309 | Albers, Tregan (1506) | Lost 1-2 | -171442 |
| 6standard | 377 | Petersen, Ben (1439) | Lost 0-2 | -181424 |
| top | average opponent: 1468record: 2-4 | new rating: 1424 | ||
| Grand Prix Dallas-Fort Worth 2016 (modern) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 291 | Preston, Raymond (1479) | Won 2-0 | +191483 |
| 2modern | 24 | Dyer, Mason (1539) | Lost 1-2 | -171466 |
| 3modern | 735 | Festini, Mark (1675) | Lost 1-2 | -141452 |
| 4modern | 890 | Nguyen, Alan (1485) | Lost 1-2 | -181434 |
| 5modern | 891 | Adrian, Evan (1450) | Won 2-1 | +181452 |
| 6modern | 636 | Meighan, Vernon (1487) | Won 2-0 | +191471 |
| 7modern | 493 | Weller-Gordon, Brian (1737) | Lost 0-2 | -131458 |
| top | average opponent: 1550record: 3-4 | new rating: 1458 | ||
| Grand Prix Charlotte 2016 (modern) | starting rating: 1538 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 482 | Rhoden, Matt (1501) | Lost 1-2 | -181520 |
| 2modern | 669 | Steady, Anthony (1582) | Lost 1-2 | -171503 |
| 3modern | 1151 | Dudkowski, Michael (1423) | Lost 0-2 | -201483 |
| 4modern | 857 | Kirkland, Joshua (1438) | Lost 1-2 | -191464 |
| top | average opponent: 1486record: 0-4 | new rating: 1464 | ||
| Grand Prix Charlotte 2015 (modern) | starting rating: 1601 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 1410 | Massie, Patrick (1500) | Won 2-1 | +161617 |
| 2modern | 1447 | Bosley, Ian (1602) | Lost 1-2 | -181599 |
| 3modern | 1493 | Sweeney, Clifton (1737) | Lost 0-2 | -161583 |
| 4modern | 1593 | Cerino, Matthew (1560) | Lost 0-2 | -181565 |
| 5modern | 1444 | Vilardi, Trevor S (1464) | Lost 0-2 | -201545 |
| 6modern | 1378 | Nolan, Brent (1442) | Won 2-0 | +161561 |
| 7modern | 1201 | Embry, Brian (1476) | Lost 1-2 | -191542 |
| 8modern | 991 | Hood, Allen (1445) | Won 2-0 | +161558 |
| 9modern | 860 | Wernsdorfer, Brian A (1463) | Lost 0-2 | -201538 |
| top | average opponent: 1521record: 3-6 | new rating: 1538 | ||
| Grand Prix Richmond 2014 (modern) | starting rating: 1534 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 1351 | Brown, Matthew K (1500) | Won 2-0 | +181552 |
| 2modern | 1204 | Cook, Wade (1515) | Won 2-0 | +171569 |
| 3modern | 1239 | Jurgens, Casey (1536) | Won 2-1 | +171586 |
| 4modern | 1089 | Coffey, Brandon 019 (1554) | Lost 1-2 | -181568 |
| 5modern | 1249 | Okowita, Alex (1599) | Won 2-0 | +181586 |
| 6modern | 1059 | Gauldin, Bryan (1556) | Won 2-0 | +181604 |
| 7modern | 1052 | Bennett, David O (1586) | Won 2-0 | +171621 |
| 8modern | 1046 | Creech, Lawrence (1681) | Lost 1-2 | -171604 |
| 9modern | 1107 | [anonymous] | Won 2-0 | +191623 |
| 10modern | 190 | Divelbliss, Timothy (1548) | Lost 1-2 | -191604 |
| 11modern | 147 | Wilson, Avery (1586) | Draw 1-1 | 01604 |
| 12modern | 179 | Anderson, Bryan (1479) | Won 2-1 | +151619 |
| 13modern | 135 | Ziskis, Mark (1605) | Lost 0-2 | -181601 |
| top | average opponent: 1569record: 8-4-1 | new rating: 1601 | ||
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 834 | Ugowski, Roman (1500) | Won 2-1 | +181518 |
| 2sealed | 701 | Garner, Derrick (1451) | Lost 1-2 | -191499 |
| 3sealed | 992 | Hackler, Joshua (1500) | Won 2-0 | +181517 |
| 4sealed | 883 | Alfred, Jacob (1509) | Won 2-1 | +181535 |
| 5sealed | 824 | Mack, Shaun (1568) | Won 2-1 | +181553 |
| 6sealed | 787 | Espejo, Jonny (1486) | Won 2-1 | +171570 |
| 7sealed | 746 | Reckenberger, Hunter (1573) | Lost 0-2 | -181552 |
| 8sealed | 415 | Brockman, Samuel (1554) | Lost 1-2 | -181534 |
| top | average opponent: 1518record: 5-3 | new rating: 1534 | ||