Mattias, John
Current rating: 1480
| Grand Prix San Jose 2017 (AER limited) | starting rating: 1472 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 569 | Ibarrientos, Irwin (1464) | Won 2-0 | +181490 |
| 2sealed | 18 | Edwards, Corin (1516) | Won 2-0 | +181508 |
| 3sealed | 104 | Archer, Andrew (1702) | Won 2-0 | +221530 |
| 4sealed | 137 | Christensen, Drew (1739) | Lost 1-2 | -141516 |
| 5sealed | 118 | Lopez Ortega, Juan Manuel (1527) | Draw 1-1 | 01516 |
| 6sealed | 244 | Lauren, Ty (1406) | Lost 0-2 | -201496 |
| 7sealed | 400 | Luemers, Robert (1601) | Lost 1-2 | -161480 |
| top | average opponent: 1565record: 3-3-1 | new rating: 1480 | ||
| Grand Prix Oakland 2013 (M14 limited) | starting rating: 1489 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 220 | Gill, Kenny (1500) | Won 2-1 | +181507 |
| 2sealed | 511 | Schick, Mark (1615) | Lost 1-2 | -161491 |
| 3sealed | 582 | Zhang, Nan (1436) | Lost 1-2 | -191472 |
| 4sealed | 593 | Miller, Joseph (1452) | Won 2-0 | +181490 |
| 5sealed | 441 | Jalasto, Sampo (1498) | Lost 0-2 | -181472 |
| top | average opponent: 1500record: 2-3 | new rating: 1472 | ||
| Grand Prix Las Vegas 2013 (MMA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 282 | Fedon, Gerardo (1771) | Won 2-0 | +231523 |
| 2sealed | 301 | Estrada, Caleb (1753) | Won 2-1 | +221545 |
| 3sealed | 3 | Dedych, Jon (1527) | Lost 0-2 | -181527 |
| 4sealed | 301 | Nelson, Joshua (1453) | Lost 1-2 | -201507 |
| 5sealed | 29 | Burnham, Michael (1499) | Lost 0-2 | -181489 |
| top | average opponent: 1601record: 2-3 | new rating: 1489 | ||