Cottrill, Bob
Current rating: 1435
Record: 12-16
| Grand Prix Columbus 2016 (legacy) | starting rating: 1488 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 7 | Schmitz, Corey (1482) | Won 2-1 | +181506 |
| 2legacy | 410 | Rodaitis, Andrew (1511) | Lost 1-2 | -181488 |
| 3legacy | 562 | Cunningham, Chris (1550) | Lost 1-2 | -171471 |
| 4legacy | 756 | Dunham, Tim (1469) | Lost 1-2 | -181453 |
| 5legacy | 721 | Cloutier, Chuck (1479) | Lost 0-2 | -171436 |
| 6legacy | 761 | Duncan, James (1413) | Won 2-1 | +171453 |
| 7legacy | 670 | Giroux, Zach (1467) | Won 2-0 | +181471 |
| 8legacy | 509 | Borodawka, Benjamin (1435) | Lost 0-2 | -181453 |
| 9legacy | 459 | Van Beek, Andrew (1463) | Lost 0-2 | -181435 |
| top | average opponent: 1474record: 3-6 | new rating: 1435 | ||
| Grand Prix Pittsburgh 2015 (modern) | starting rating: 1511 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 291 | Kline, Joshua (1529) | Lost 0-2 | -181493 |
| 2modern | 825 | Babbitt, Raymond (1400) | Won 2-0 | +161509 |
| 3modern | 959 | Bienkowski, Jacob (1501) | Lost 0-2 | -181491 |
| 4modern | 957 | Romich, Brian (1480) | Won 2-0 | +181509 |
| 5modern | 790 | Abbate, Wayne (1423) | Lost 1-2 | -201489 |
| 6modern | 886 | Biamonte, Vince (1422) | Won 2-1 | +171506 |
| 7modern | 605 | Byerly, Larry (1500) | Lost 0-2 | -181488 |
| top | average opponent: 1465record: 3-4 | new rating: 1488 | ||
| Grand Prix Cleveland 2015 (FRF limited) | starting rating: 1565 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 467 | Reindl, Colin (1638) | Lost 1-2 | -171548 |
| 2sealed | 468 | Jasper, Timothy (1542) | Lost 0-2 | -181530 |
| 3sealed | 766 | Mitchell, John (1463) | Lost 1-2 | -191511 |
| top | average opponent: 1548record: 0-3 | new rating: 1511 | ||
| Grand Prix Pittsburgh 2013 (GTC limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 304 | Shorr, Ardon (1500) | Won 2-0 | +181518 |
| 2sealed | 290 | Stitt, Leroy (1484) | Won 2-0 | +171535 |
| 3sealed | 26 | Durante, Jeffrey (1535) | Won 2-0 | +181553 |
| 4sealed | 124 | Jarman, Brad (1608) | Lost 0-2 | -171536 |
| 5sealed | 229 | Morgan, Will W (1542) | Won 2-0 | +181554 |
| 6sealed | 174 | Nighbor, Chris (1730) | Won 2-1 | +221576 |
| 7sealed | 127 | Thompson, Gerry (1938) | Lost 0-2 | -121564 |
| 8sealed | 125 | Holzworth, Michael (1599) | Won 2-0 | +191583 |
| 9sealed | 131 | Detwiler, Jared (1577) | Lost 1-2 | -181565 |
| top | average opponent: 1613record: 6-3 | new rating: 1565 | ||