Collins, Jeff
Current rating: 1536
Record: 8-7
| Grand Prix San Diego 2011 (ISD limited) | starting rating: 1482 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 99 | Stelford, Preston (1500) | Won 2-1 | +181500 |
| 2sealed | 17 | Van Cleave, Trey (1755) | Won 2-0 | +221522 |
| 3sealed | 50 | Wang, Xuan-ji (1697) | Won 2-0 | +221544 |
| 4sealed | 51 | Leeper, Ryan (1500) | Lost 1-2 | -191525 |
| 5sealed | 95 | Gade, Brandon (1581) | Lost 0-2 | -171508 |
| 6sealed | 115 | Barnett, Jessica (1520) | Won 2-0 | +181526 |
| 7sealed | 94 | Tabler, Michael (1671) | Won 2-1 | +211547 |
| 8sealed | 84 | Juza, Martin (1992) | Lost 1-2 | -111536 |
| average opponent: 1652record: 5-3 | new rating: 1536 | |||
| Grand Prix Portland 2010 (M11 limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 157 | Martinez, Jose M (1493) | Won 2-0 | +181518 |
| 2sealed | 209 | Parkinson, Deric (1518) | Won 2-0 | +181536 |
| 3sealed | 174 | Goranowski, Karl (1483) | Won 2-1 | +171553 |
| 4sealed | 130 | Nakagawa, Gregg (1560) | Lost 0-2 | -181535 |
| 5sealed | 180 | Gibson, Jamal (1553) | Lost 1-2 | -181517 |
| 6sealed | 228 | Lindquist, Ian (1546) | Lost 0-2 | -171500 |
| 7sealed | 273 | Natta, Paul (1484) | Lost 0-2 | -181482 |
| average opponent: 1519record: 3-4 | new rating: 1482 | |||