Powell, Shelton
Current rating: 1371
Record: 28-43
| Grand Prix Atlanta 2019 (legacy) | starting rating: 1411 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 54 | Ray, Wil (1540) | Lost 1-2 | -161395 |
| 2legacy | 292 | Arthurs, Marshall (1768) | Lost 1-2 | -111384 |
| 3legacy | 446 | Giering, Cole (1473) | Won 2-1 | +191403 |
| 4legacy | 451 | Jennings, Conan (1553) | Lost 1-2 | -151388 |
| 5legacy | 409 | Munoz, Corey (1462) | Lost 0-2 | -171371 |
| top | average opponent: 1559record: 1-4 | new rating: 1371 | ||
| Grand Prix Memphis 2019 (RNA standard) | starting rating: 1442 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 193 | Drew, Council (1420) | Won 2-0 | +181460 |
| 3standard | 21 | Robin, Alex (1522) | Lost 1-2 | -171443 |
| 4standard | 302 | Martin, Clyde (1600) | Lost 1-2 | -151428 |
| 5standard | 354 | Allums, Josh (1500) | Lost 1-2 | -171411 |
| top | average opponent: 1510record: 1-3 | new rating: 1411 | ||
| Grand Prix Dallas-Fort Worth 2018 (DOM limited) | starting rating: 1430 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 20 | Forker, Nicholas (1399) | Won 2-0 | +181448 |
| 3sealed | 193 | Cullerton, Evan (1374) | Lost 0-2 | -201428 |
| 4sealed | 249 | Swain, Thomas (1539) | Won 2-0 | +201448 |
| 5sealed | 220 | Humphries, Mickey (1827) | Lost 1-2 | -111437 |
| 6sealed | 301 | Nemeth, Mark (1642) | Won 2-1 | +211458 |
| 7sealed | 140 | Schelsteder, Michael (1539) | Lost 0-2 | -161442 |
| top | average opponent: 1553record: 3-3 | new rating: 1442 | ||
| Grand Prix Memphis 2018 (RIX standard) | starting rating: 1416 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 121 | Thompson, Vince (1515) | Won 2-0 | +201436 |
| 3standard | 179 | Snyder, Asa (1734) | Lost 1-2 | -131423 |
| 4standard | 307 | Mayo, Kevin (1497) | Won 2-1 | +201443 |
| 5standard | 110 | Hatch, Wayne (1674) | Won 2-0 | +221465 |
| 6standard | 77 | Decker, Mike (1607) | Won 2-0 | +201485 |
| 7standard | 28 | Lee, Brian (1697) | Lost 1-2 | -141471 |
| 8standard | 98 | Lopez, Chris (1822) | Won 2-0 | +241495 |
| 9standard | 107 | Lamb, Dustin (1610) | Lost 1-2 | -161479 |
| 10standard | 108 | Soorani, Shaheen (1979) | Lost 0-2 | -91470 |
| 11standard | 93 | Joseph, Leon (1715) | Won 2-1 | +221492 |
| 12standard | 73 | Andrus, Justin (1611) | Lost 1-2 | -161476 |
| 13standard | 91 | Cook, Ethan (1563) | Lost 0-2 | -161460 |
| 14standard | 92 | Egan, Kevin (1732) | Lost 1-2 | -131447 |
| 15standard | 87 | Rich, Justin (1524) | Lost 0-2 | -171430 |
| top | average opponent: 1663record: 6-8 | new rating: 1430 | ||
| Grand Prix Houston 2018 (RIX limited) | starting rating: 1411 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 136 | Wilkins, Bryon (1662) | Lost 1-2 | -131398 |
| 3sealed | 320 | Cullerton, Evan (1327) | Won 2-0 | +171415 |
| 4sealed | 174 | Corrigan, Abe (1862) | Lost 1-2 | -111404 |
| 5sealed | 278 | Whiteside, Edward (1582) | Won 2-1 | +211425 |
| 6sealed | 134 | Stubblefield, Chad (1557) | Won 2-1 | +211446 |
| 7sealed | 79 | Timmler, Kye (1725) | Lost 0-2 | -131433 |
| 8sealed | 159 | Mahon, Chance (1506) | Lost 0-2 | -171416 |
| top | average opponent: 1603record: 3-4 | new rating: 1416 | ||
| Grand Prix Oklahoma City 2017 (modern) | starting rating: 1450 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 227 | Dixon, Paul (1509) | Lost 0-2 | -171433 |
| 3modern | 509 | Thompson-Exner, Gavin (1526) | Won 2-0 | +201453 |
| 4modern | 175 | Barnett, Stephen (1916) | Lost 1-2 | -101443 |
| 5modern | 306 | Koehn, Brian (1497) | Lost 0-2 | -171426 |
| 6modern | 499 | Pannone, Alexander (1482) | Won 2-1 | +191445 |
| 7modern | 385 | Smith, Matthew (1548) | Lost 0-2 | -161429 |
| 8modern | 422 | Stafford, Matthew B (1460) | Lost 0-2 | -181411 |
| top | average opponent: 1562record: 2-5 | new rating: 1411 | ||
| Grand Prix Atlanta 2017 (XLN standard) | starting rating: 1495 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 58 | Dizon, Jomar (1518) | Won 2-1 | +191514 |
| 3standard | 91 | Sorrells, Aaron (1628) | Lost 0-2 | -161498 |
| 4standard | 268 | League, Charles (1804) | Lost 0-2 | -131485 |
| 5standard | 396 | D'Arcy, Declan (1415) | Lost 0-2 | -191466 |
| 6standard | 476 | Mata, Andrew (1602) | Lost 1-2 | -161450 |
| top | average opponent: 1593record: 1-4 | new rating: 1450 | ||
| Grand Prix Denver 2016 (KLD standard) | starting rating: 1470 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 26 | Franklin, Lance (1673) | Lost 0-2 | -141456 |
| 2standard | 409 | Beyerlein, William (1480) | Won 2-1 | +181474 |
| 3standard | 487 | Zezula, John (1593) | Lost 1-2 | -161458 |
| 4standard | 586 | Wiley, Benjamin (1460) | Lost 1-2 | -181440 |
| 5standard | 658 | Rivera, Antonio (1463) | Won 0-0 | +191459 |
| 6standard | 578 | Nelson, John R (1379) | Won 2-0 | +161475 |
| 7standard | 477 | Johnson, Anthony (1561) | Won 2-1 | +201495 |
| 8standard | 272 | Hui, Brandon (1508) | Won 2-1 | +181513 |
| 9standard | 246 | Samuels, Bradley (1525) | Lost 0-2 | -181495 |
| top | average opponent: 1516record: 5-4 | new rating: 1495 | ||
| Grand Prix Dallas-Fort Worth 2016 (modern) | starting rating: 1516 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 248 | Simms, Jason (1586) | Lost 0-2 | -171499 |
| 4modern | 326 | Hayes, Carver (1517) | Lost 0-2 | -171482 |
| 5modern | 572 | Dagenais, Jephree (1501) | Won 2-0 | +181500 |
| 6modern | 362 | McShea, Kevin (1853) | Lost 1-2 | -121488 |
| 7modern | 504 | Wiedel, James (1486) | Lost 0-2 | -181470 |
| top | average opponent: 1588record: 1-4 | new rating: 1470 | ||
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 124 | Lickliter, Raymond (1449) | Lost 1-2 | -191481 |
| 2modern | 408 | Kraft, Toby (1467) | Lost 1-2 | -181463 |
| 3modern | 538 | Velez, Oscar (1434) | Won 0-0 | +171480 |
| 4modern | 1056 | Carter, Jacob (1483) | Won 2-1 | +181498 |
| 5modern | 424 | Gibson, G. W. (1426) | Won 2-1 | +171515 |
| 6modern | 183 | Gardner, Austin (1558) | Lost 1-2 | -171498 |
| 7modern | 297 | Smith, Matthew W (1469) | Won 2-0 | +171515 |
| 8modern | 222 | Lamb, Jesse (1524) | Lost 1-2 | -181497 |
| 9modern | 216 | Dunavant, James (1525) | Won 2-1 | +191516 |
| top | average opponent: 1482record: 5-4 | new rating: 1516 | ||