Herron, John
Current rating: 1459
Record: 14-18
| Grand Prix Hartford 2018 (modern) | starting rating: 1401 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 561 | Giguere, David-Alexandre (1466) | Lost 0-2 | -171384 |
| 2modern | 497 | Levitan, Jordan (1458) | Won 2-1 | +191403 |
| 3modern | 415 | Morin, Jesse (1446) | Lost 0-2 | -171386 |
| 4modern | 773 | Whaley, Christopher (1548) | Won 2-0 | +211407 |
| 5modern | 644 | Dilgard, Nathan (1498) | Won 2-1 | +201427 |
| 6modern | 380 | Fehr, Gabriel (1799) | Won 2-1 | +241451 |
| 7modern | 289 | Mason, Sky (1836) | Lost 0-2 | -111440 |
| 8modern | 279 | Lee, An-Jen (1472) | Won 2-0 | +191459 |
| top | average opponent: 1565record: 5-3 | new rating: 1459 | ||
| Grand Prix Atlantic City 2015 (DTK limited) | starting rating: 1415 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 427 | Annino, Rich (1448) | Won 2-0 | +181433 |
| 2sealed | 35 | Loprieno, Daniel (1519) | Won 2-1 | +201453 |
| 3sealed | 97 | Corpora, Jon (1447) | Lost 1-2 | -181435 |
| 4sealed | 491 | Ladnier, Andrew (1496) | Lost 0-2 | -171418 |
| 5sealed | 574 | Grezes, Felix (1467) | Lost 0-2 | -171401 |
| top | average opponent: 1475record: 2-3 | new rating: 1401 | ||
| Grand Prix Richmond 2014 (modern) | starting rating: 1481 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 335 | Shoopman, Eric (1523) | Lost 0-2 | -171464 |
| 2modern | 362 | Niece, Lee (1697) | Lost 0-2 | -141450 |
| 3modern | 543 | Ballard, Chase (1464) | Lost 0-2 | -171433 |
| 4modern | 548 | Crossland, Patrick (1445) | Lost 0-2 | -181415 |
| top | average opponent: 1532record: 0-4 | new rating: 1415 | ||
| Grand Prix Atlantic City 2013 (RTR standard) | starting rating: 1501 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 275 | Gazley, Jesse (1500) | Lost 1-2 | -181483 |
| 2standard | 454 | Corcoran, Daniel (1465) | Lost 0-2 | -181465 |
| 3standard | 668 | Oestreicher, Samuel (1464) | Won 2-0 | +181483 |
| 4standard | 619 | Rosberg, Sean (1539) | Lost 0-2 | -171466 |
| 5standard | 662 | Badillo, Rogelio (1485) | Lost 1-2 | -181448 |
| 6standard | 586 | Ward, Mike (1357) | Won 2-0 | +171465 |
| 7standard | 487 | Binnie, Fergus (1464) | Won 2-0 | +181483 |
| 8standard | 358 | Quintero, Pedro (1404) | Won 2-0 | +161499 |
| 9standard | 277 | Colon, Noel (1505) | Lost 0-2 | -181481 |
| top | average opponent: 1465record: 4-5 | new rating: 1481 | ||
| Grand Prix Philadelphia 2012 (RTR limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 98 | Ho, Lan (1560) | Lost 0-2 | -171483 |
| 2sealed | 322 | Pagano, Joseph (1482) | Won 2-0 | +181501 |
| 3sealed | 205 | Clarizio, James (1467) | Won 2-0 | +171518 |
| 4sealed | 203 | Day, Aaron (1519) | Lost 0-2 | -181500 |
| 5sealed | 227 | Maines, Chris (1529) | Won 2-1 | +191519 |
| 6sealed | 271 | Wolloch, Adam (1546) | Lost 0-2 | -181501 |
| top | average opponent: 1517record: 3-3 | new rating: 1501 | ||