Irwin, Joshua
Current rating: 1364
| Grand Prix Minneapolis 2016 (SOI standard) | starting rating: 1430 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 140 | Maahs, Anthony (1518) | Lost 1-2 | -161414 |
| 2standard | 459 | Sayner, Nick (1485) | Lost 1-2 | -171397 |
| 3standard | 679 | Aspiras, Micah (1464) | Lost 0-2 | -171380 |
| 4standard | 705 | Goodson, Kyle (1443) | Lost 0-2 | -161364 |
| top | average opponent: 1477record: 0-4 | new rating: 1364 | ||
| Grand Prix Washington DC 2014 (JOU limited) | starting rating: 1464 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 218 | Snyder, Andy (1500) | Won 2-1 | +191483 |
| 2sealed | 322 | Watts, Russell (1531) | Lost 1-2 | -171466 |
| 3sealed | 496 | Lambert, Adam (1448) | Lost 0-2 | -191447 |
| 4sealed | 548 | Lewandowski, Jeremy (1505) | Lost 0-2 | -171430 |
| top | average opponent: 1496record: 1-3 | new rating: 1430 | ||
| Grand Prix Denver 2011 (MBS limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 27 | Clauson, Nole J (1500) | Lost 0-2 | -181482 |
| 2sealed | 165 | Sieloff, Phil (1482) | Lost 1-2 | -181464 |
| 3sealed | 156 | Mason, Stina M (1464) | Lost 0-2 | -181446 |
| 4sealed | 181 | Broker, Roman (1447) | Won 2-0 | +181464 |
| top | average opponent: 1473record: 1-3 | new rating: 1464 | ||