Lumb, David
Current rating: 1326
Record: 18-36-2
| Grand Prix Dallas-Fort Worth 2018 (DOM limited) | starting rating: 1313 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 147 | Turney, Paul (1467) | Won 2-0 | +211334 |
| 2sealed | 3 | Edwards, Craig (1701) | Lost 0-2 | -121322 |
| 3sealed | 399 | Collazo, Cesar (1625) | Won 2-0 | +231345 |
| 4sealed | 349 | Hamilton, Brittany (1617) | Won 2-1 | +231368 |
| 5sealed | 180 | Neal, Richard (1570) | Lost 1-2 | -141354 |
| 6sealed | 189 | Zyla, Sarah (1676) | Lost 1-2 | -131341 |
| 7sealed | 261 | Van Zee, Will (1498) | Lost 0-2 | -151326 |
| top | average opponent: 1594record: 3-4 | new rating: 1326 | ||
| Grand Prix Houston 2018 (RIX limited) | starting rating: 1348 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 106 | Detiveaux, Raymond (1714) | Lost 0-2 | -121336 |
| 2sealed | 335 | Furqueron, Jon-Luc (1480) | Won 2-1 | +211357 |
| 3sealed | 311 | Eckelmann, Bradley (1500) | Lost 1-2 | -161341 |
| 4sealed | 303 | Bulnes, Armando (1686) | Lost 0-2 | -121329 |
| 5sealed | 359 | Jordan, Jason (1404) | Lost 0-2 | -161313 |
| top | average opponent: 1557record: 1-4 | new rating: 1313 | ||
| Grand Prix Houston 2016 (OGW standard) | starting rating: 1337 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 399 | Trotman, Kerry (1498) | Won 2-0 | +211358 |
| 2standard | 424 | Condon, Alex (1570) | Won 2-0 | +221380 |
| 3standard | 230 | Schafer, Gregory (1606) | Lost 1-2 | -141366 |
| 4standard | 385 | Heise, William (1517) | Won 2-1 | +211387 |
| 5standard | 332 | Quiroga, Lionel (1562) | Lost 1-2 | -151372 |
| 6standard | 383 | Amaro, Eduardo (1517) | Lost 1-2 | -161356 |
| 7standard | 442 | Elenbaas, Evan (1504) | Won 2-1 | +211377 |
| 8standard | 390 | De La Loza, Alejandro (1597) | Lost 0-2 | -141363 |
| 9standard | 411 | Ardoin, Micheal (1513) | Lost 0-2 | -151348 |
| top | average opponent: 1543record: 4-5 | new rating: 1348 | ||
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1365 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 194 | Friend, Jerad (1500) | Lost 1-2 | -161349 |
| 2modern | 335 | Jordan, Adam (1410) | Won 2-0 | +191368 |
| 3modern | 350 | Caton, Kenneth (1556) | Won 0-0 | +221390 |
| 4modern | 193 | Blackmor, Jason (1590) | Lost 1-2 | -151375 |
| 5modern | 476 | Zaidi, Jibraeel (1815) | Lost 1-2 | -101365 |
| 6modern | 408 | Barnes, David [USA] (1485) | Lost 0-2 | -161349 |
| 7modern | 361 | Alonzo, Joaquin (1464) | Lost 1-2 | -161333 |
| 8modern | 293 | Sposato, Jared (1446) | Won 2-0 | +201353 |
| 9modern | 238 | Fritz, Luke (1468) | Lost 0-2 | -161337 |
| top | average opponent: 1526record: 3-6 | new rating: 1337 | ||
| Grand Prix Dallas-Fort Worth 2015 (ORI limited) | starting rating: 1403 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 557 | Michel, Jeffrey (1464) | Lost 0-2 | -171386 |
| 2sealed | 439 | Loya, Darrell (1538) | Lost 0-2 | -151371 |
| 3sealed | 48 | Rangitsch, Darian (1464) | Won 2-1 | +201391 |
| 4sealed | 599 | Mankins, Patrick (1488) | Lost 1-2 | -171374 |
| 5sealed | 599 | Edwards, Carolyn (1464) | Won 2-0 | +201394 |
| 6sealed | 520 | Davies, Reese (1481) | Won 2-1 | +201414 |
| 7sealed | 384 | Whitmore, Trevor (1509) | Lost 1-2 | -171397 |
| 8sealed | 314 | Killam, Austin (1481) | Lost 0-2 | -161381 |
| 9sealed | 256 | Richardson, Donald (1471) | Lost 0-2 | -161365 |
| top | average opponent: 1484record: 3-6 | new rating: 1365 | ||
| Grand Prix San Antonio 2014 (KTK standard) | starting rating: 1397 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 23 | Bustamante, Analynn (1597) | Lost 0-2 | -151382 |
| 3standard | 242 | Thirkill, Dominic (1500) | Won 2-1 | +211403 |
| 4standard | 189 | Phillips, Joshua (1608) | Won 2-1 | +211424 |
| 5standard | 137 | Tran, Minh (1627) | Lost 0-2 | -141410 |
| 6standard | 253 | Steele, Derrick (1721) | Lost 0-2 | -131397 |
| 7standard | 285 | Griffin, Mike (1503) | Draw 1-1 | +21399 |
| 8standard | 216 | Castrejon, Jose (1497) | Won 2-0 | +201419 |
| 9standard | 157 | Dixon, Ian (1533) | Lost 0-2 | -161403 |
| top | average opponent: 1573record: 3-4-1 | new rating: 1403 | ||
| Grand Prix Dallas-Fort Worth 2013 (THS standard) | starting rating: 1465 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 363 | Graves, Chris (1500) | Lost 0-2 | -171448 |
| 2standard | 355 | Montes de Oca III, Luis (1429) | Won 2-0 | +171465 |
| 3standard | 346 | Vesper, Aaron (1501) | Draw 1-1 | +11466 |
| 4standard | 355 | Buchborn, Quinten (1500) | Lost 0-2 | -171449 |
| 5standard | 401 | Davis, Michael (1488) | Lost 1-2 | -181431 |
| 6standard | 394 | Noble, Jeffrey (1464) | Lost 0-2 | -171414 |
| 7standard | 358 | Grindy, Sean (1461) | Lost 0-2 | -171397 |
| top | average opponent: 1478record: 1-5-1 | new rating: 1397 | ||
| Grand Prix Houston 2013 (DGM limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 233 | Smith, Jeremy (1514) | Lost 1-2 | -181482 |
| 2sealed | 316 | Dougan, Jacob (1528) | Lost 0-2 | -171465 |
| top | average opponent: 1521record: 0-2 | new rating: 1465 | ||