McCullough, John
Current rating: 1498
| Grand Prix Hartford 2018 (modern) | starting rating: 1518 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 66 | Scannell, Kevin (1433) | Lost 0-2 | -201498 |
| top | record: 0-1 | new rating: 1498 | ||
| Grand Prix New Jersey 2017 (lim) (XLN limited) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 289 | Rubin, Jonathan (1755) | Won 2-0 | +231540 |
| 2sealed | 129 | Clarke, Collin (1566) | Lost 1-2 | -181522 |
| 3sealed | 282 | Klenske, Dylan (1220) | Won 2-1 | +131535 |
| 4sealed | 172 | Schenker, Austin (1554) | Lost 1-2 | -181517 |
| 5sealed | 334 | Holmes, Evan (1570) | Won 2-0 | +191536 |
| 6sealed | 312 | Duchock, Jonathan (1516) | Lost 0-2 | -181518 |
| top | average opponent: 1530record: 3-3 | new rating: 1518 | ||
| Grand Prix Providence 2016 (KLD standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 240 | Sorensen, Scott (1429) | Won 2-1 | +171517 |
| 2standard | 1 | Bugalter, Ben (1512) | Lost 0-2 | -181499 |
| 3standard | 272 | Zawacki, Connor (1500) | Draw 1-1 | 01499 |
| 4standard | 372 | Gemme, Mike (1551) | Won 2-0 | +191518 |
| 5standard | 255 | Napier, Wally (1483) | Won 2-0 | +171535 |
| 6standard | 168 | Russo, Roberto (1527) | Lost 0-2 | -181517 |
| 7standard | 263 | Parenty, Mike (1512) | Won 2-1 | +181535 |
| 8standard | 177 | Wang, Yichen [CHN] (1572) | Lost 1-2 | -181517 |
| top | average opponent: 1511record: 4-3-1 | new rating: 1517 | ||