Janssen, Jon
Current rating: 1587
Record: 17-14
| Grand Prix Atlanta 2019 (legacy) | starting rating: 1575 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 305 | Mcdonald, William (1500) | Won 2-1 | +171592 |
| 2legacy | 85 | Freeburger, Ryan (1585) | Lost 1-2 | -181574 |
| 3legacy | 330 | Lee, William 5529 (1502) | Lost 0-2 | -201554 |
| 4legacy | 444 | Phillips, Cody (1459) | Won 2-1 | +171571 |
| 5legacy | 336 | Vawter, Andrew (1477) | Won 2-0 | +161587 |
| top | average opponent: 1505record: 3-2 | new rating: 1587 | ||
| Grand Prix Columbus 2016 (legacy) | starting rating: 1567 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 170 | Sunseri, Jeremy (1383) | Won 2-1 | +151582 |
| 4legacy | 171 | Lee, Jeffrey (1541) | Won 2-0 | +171599 |
| 5legacy | 79 | DeMars, Brian (1893) | Won 2-1 | +231622 |
| 6legacy | 47 | Austin, Shawn (1717) | Won 2-0 | +201642 |
| 7legacy | 16 | Pressley, Tyler (1592) | Lost 1-2 | -191623 |
| 8legacy | 20 | Dean, Paul (1968) | Lost 1-2 | -121611 |
| 9legacy | 160 | Thiel, Jon (1594) | Lost 1-2 | -181593 |
| 10legacy | 257 | Greenbaum, Micah (1601) | Lost 0-2 | -181575 |
| top | average opponent: 1661record: 4-4 | new rating: 1575 | ||
| Grand Prix Charlotte 2015 (modern) | starting rating: 1471 | |||
| round | table | opponent (rating) | result | Δrating |
| 2modern | 428 | Wright, Christopher (1563) | Won 2-0 | +191490 |
| 3modern | 296 | Cook, Keith (1535) | Won 2-0 | +191509 |
| 4modern | 273 | Knierim, Grant (1570) | Lost 1-2 | -171492 |
| 5modern | 254 | Immen, Brandon W (1536) | Won 2-1 | +191511 |
| 6modern | 269 | Chirichello, Carmine (1538) | Won 2-1 | +181529 |
| 7modern | 236 | Williams, Rich (1577) | Lost 0-2 | -171512 |
| 8modern | 254 | Zornes, James (1764) | Won 2-1 | +231535 |
| 9modern | 271 | McGlothlin, Kenneth A (1590) | Won 2-1 | +191554 |
| 10modern | 765 | Dykman, Stephen (1835) | Won 2-1 | +231577 |
| 11modern | 645 | Ketter, Kent (1818) | Lost 1-2 | -141563 |
| 12modern | 713 | Piotrowiak, Matthew (1608) | Lost 0-2 | -171546 |
| 13modern | 741 | Parks, James (1562) | Won 2-0 | +181564 |
| 14modern | 700 | Guy, Stacy (1634) | Lost 1-2 | -161548 |
| 15modern | 710 | Margolis, Max (1637) | Won 2-0 | +191567 |
| top | average opponent: 1626record: 9-5 | new rating: 1567 | ||
| Grand Prix Washington DC 2013 (legacy) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 334 | Lacker, Jonathan (1500) | Won 2-0 | +181518 |
| 4legacy | 12 | Coleman, Allison (1636) | Lost 1-2 | -161502 |
| 5legacy | 349 | Bogner, David (1533) | Lost 1-2 | -171485 |
| 6legacy | 342 | Rill, Eric (1702) | Lost 0-2 | -141471 |
| top | average opponent: 1593record: 1-3 | new rating: 1471 | ||