Kastelein, John
Current rating: 1451
Record: 15-19-1 (GP) / 3-5 (professional)
| Grand Prix San Diego 2015 (ORI standard) | starting rating: 1487 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 295 | Pashby, Gregrey (1500) | Lost 0-2 | -171470 |
| 3standard | 345 | Zwolinski, Jacob (1497) | Won 2-0 | +181488 |
| 4standard | 187 | Mednev, Ivo (1396) | Lost 0-2 | -201468 |
| 5standard | 335 | Guerrero, Raphael (1460) | Won 2-1 | +181486 |
| 6standard | 269 | Reitenour, Chris (1529) | Won 2-1 | +191505 |
| 7standard | 178 | Tayek, Chandler (1535) | Lost 0-2 | -171488 |
| 8standard | 246 | Tovar, Ricky (1486) | Lost 0-2 | -181470 |
| 9standard | 224 | Komor, Russell (1468) | Lost 0-2 | -191451 |
| top | average opponent: 1484record: 3-5 | new rating: 1451 | ||
| Grand Prix Los Angeles 2014 (KTK standard) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 255 | Petrushchenko, Sergey (1482) | Lost 0-2 | -181486 |
| 4standard | 234 | Heaney, Jason (1519) | Won 2-0 | +191505 |
| 5standard | 179 | Adams, Cody (1526) | Draw 1-1 | 01505 |
| 6standard | 230 | Dyda, Melinda (1485) | Won 2-0 | +181523 |
| 7standard | 37 | Clark, Jason (1600) | Lost 0-2 | -171506 |
| 8standard | 242 | Tovar, Ricky (1463) | Lost 1-2 | -191487 |
| top | average opponent: 1513record: 2-3-1 | new rating: 1487 | ||
| Grand Prix Boston-Worcester 2014 (modern) | starting rating: 1504 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 4 | Savran, Michelle (1518) | Lost 1-2 | -181486 |
| 3modern | 332 | Ly, Joel (1500) | Lost 1-2 | -181468 |
| 4modern | 466 | Warhola, Colin (1482) | Won 2-1 | +181486 |
| 5modern | 444 | Wang, Peixian (1494) | Won 2-0 | +181504 |
| 6modern | 228 | Lavoie, Alex (1513) | Lost 0-2 | -171487 |
| 7modern | 263 | Machkasov, Andrew (1500) | Won 2-0 | +181505 |
| 8modern | 228 | Frontiero, Chris (1530) | Won 2-0 | +181523 |
| 9modern | 162 | Stromley, Michael (1477) | Lost 0-2 | -191504 |
| top | average opponent: 1502record: 4-4 | new rating: 1504 | ||
| Grand Prix Washington DC 2014 (JOU limited) | starting rating: 1471 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 173 | Woods, Ian (1538) | Won 2-0 | +191490 |
| 4sealed | 21 | Laberge, Vincent (1495) | Lost 1-2 | -181472 |
| 5sealed | 110 | Morton, Kevin (1521) | Won 2-0 | +191491 |
| 6sealed | 163 | Herren, Jason (1636) | Won 2-1 | +211512 |
| 7sealed | 56 | Ferrando, Matthew (1878) | Won 2-1 | +241536 |
| 8sealed | 31 | Michael, Kevin (1883) | Won 2-1 | +241560 |
| 9sealed | 7 | Sigrist, Mike (1984) | Lost 0-2 | -111549 |
| 10draft | 84 | Tremblay, Sebastien (1682) | Lost 1-2 | -151534 |
| 11draft | 78 | Hum, Barry (1739) | Lost 1-2 | -141520 |
| 12draft | 80 | Reed, David (1600) | Lost 1-2 | -171503 |
| 13draft | 50 | Kent, David (1538) | Won 2-1 | +191522 |
| 14draft | 33 | Frank, Andrew (1515) | Lost 1-2 | -181504 |
| top | average opponent: 1667record: 6-6 | new rating: 1504 | ||
| Grand Prix Montreal 2014 (BNG limited) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 379 | Boyling, Adam (1552) | Lost 0-2 | -171471 |
| top | record: 0-1 | new rating: 1471 | ||
| Pro Tour Theros (THS standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 91 | Jesse, Zachary (1626) | Lost 0-2 | -161484 |
| 2draft | 86 | Fennell, Christopher (2023) | Lost 1-2 | -91475 |
| 3draft | 208 | Borba, Rodrigo (1931) | Lost 0-2 | -101465 |
| 4standard | 206 | Desilets, Federico (1447) | Lost 0-2 | -181447 |
| 5standard | 206 | Jimenez, Nikki (1578) | Won 2-1 | +201467 |
| 6standard | 177 | Falcioni, Matthew (1671) | Won 2-0 | +221489 |
| 7standard | 161 | Lai, Pak Yin (1446) | Won 2-0 | +171506 |
| 8standard | 137 | Stoldt, Marc (1492) | Lost 0-2 | -181488 |
| top | average opponent: 1652record: 3-5 | new rating: 1488 | ||