Stammerjohan, William
Current rating: 1495
Record: 5-6-1 (GP) / 7-7 (professional)
| Grand Prix Atlanta 2001 (ODY limited) | starting rating: 1494 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 24 | McGuire, John (1500) | Lost 1-2 | -181476 |
| 2sealed | 105 | Crow, Matt (1482) | Won 2-0 | +181494 |
| 3sealed | 101 | Sotter, Paul (1500) | Won 2-0 | +191513 |
| 4sealed | 68 | Kinner, Jeffrey (1501) | Draw 1-1 | -11512 |
| 5sealed | 88 | Terry, Alex (1518) | Won 2-0 | +181530 |
| 6sealed | 55 | Rothman, Ben (1528) | Lost 0-2 | -181512 |
| 7sealed | 78 | Loden, Lance (1541) | Lost 0-2 | -171495 |
| top | average opponent: 1510record: 3-3-1 | new rating: 1495 | ||
| Grand Prix Dallas 2000 (INV limited) | starting rating: 1514 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 25 | Haynes, Justin (1500) | Lost 0-2 | -191495 |
| 2sealed | 95 | Bongiovanni, Mauro (1468) | Won 2-0 | +181513 |
| 3sealed | 71 | Blagg, John (1499) | Lost 0-2 | -181495 |
| 4sealed | 117 | Ball, Skylar (1480) | Won 2-0 | +171512 |
| 5sealed | 81 | Lisica, Matt (1500) | Lost 0-2 | -181494 |
| top | average opponent: 1490record: 2-3 | new rating: 1494 | ||
| Pro Tour Chicago 1999 (extended) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 134 | Mello, Patrick (1623) | Lost 0-2 | -161484 |
| 2extended | 158 | Thornton, Michael (1483) | Won 2-1 | +181502 |
| 3extended | 88 | Slapak, Mark (1417) | Won 2-0 | +171519 |
| 4extended | 77 | Shuler, John (1591) | Won 2-1 | +191538 |
| 5extended | 41 | O'Mahoney-Schwartz, Daniel (1654) | Lost 1-2 | -161522 |
| 6extended | 81 | Canu, Franck (1642) | Won 2-1 | +201542 |
| 7extended | 42 | Douyama, Tsuyoshi (1497) | Won 2-1 | +171559 |
| 8extended | 21 | Valkyser, Stephan (1657) | Lost 1-2 | -161543 |
| 9extended | 33 | Fiore, Stefano (1579) | Lost 0-2 | -171526 |
| 10extended | 38 | Pustilnik, Michael (1737) | Won 2-0 | +221548 |
| 11extended | 35 | Nishiwaki, Masahiro (1515) | Lost 0-2 | -191529 |
| 12extended | 37 | Quelle, Blake (1537) | Lost 0-2 | -181511 |
| 13extended | 40 | Bingen, Sturla (1648) | Won 2-0 | +211532 |
| 14extended | 38 | Stark, Ben S (1534) | Lost 0-2 | -181514 |
| top | average opponent: 1579record: 7-7 | new rating: 1514 | ||