Cox, Jon
Current rating: 1673
Record: 29-22
| Grand Prix Charlotte 2013 (GTC limited) | starting rating: 1583 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 457 | Coates, Carmen (1500) | Won 2-0 | +171600 |
| 2sealed | 19 | Goins, John (1437) | Won 2-1 | +151615 |
| 3sealed | 47 | Bullard, Sam (1537) | Won 2-1 | +161631 |
| 4sealed | 72 | Izsak, Yoel (1624) | Lost 1-2 | -181613 |
| 5sealed | 88 | Seymour, Brian (1536) | Won 2-0 | +171630 |
| 6sealed | 126 | Laufersweiler, Owen (1602) | Won 2-1 | +171647 |
| 7sealed | 23 | Beasley, Christopher D (1568) | Won 2-1 | +171664 |
| 8sealed | 12 | Breslin, David (1624) | Won 2-0 | +171681 |
| 9sealed | 23 | Craddock, William (1992) | Lost 1-2 | -131668 |
| 10sealed | 56 | Schadt, Jeff (1710) | Won 2-1 | +191687 |
| 11sealed | 69 | Poesel, Fred C (1576) | Won 2-1 | +161703 |
| 12draft | 67 | Henricks, J.T. (1778) | Lost 0-2 | -161687 |
| 13draft | 18 | DeMars, Brian (1922) | Won 2-0 | +221709 |
| 14draft | 53 | Keene, Matthew (1812) | Lost 1-2 | -161693 |
| 15draft | 49 | Turpin, Andrew (1581) | Lost 1-2 | -201673 |
| top | average opponent: 1653record: 10-5 | new rating: 1673 | ||
| Grand Prix Indianapolis 2013 (RTR limited) | starting rating: 1472 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 71 | Reindl, Colin (1633) | Won 2-1 | +211493 |
| 2sealed | 14 | Louie, Aaron (1536) | Won 2-1 | +191512 |
| 3sealed | 31 | Al-Bacha, Wesimo (1966) | Lost 1-2 | -101502 |
| 4sealed | 232 | Askeland, Chad (1499) | Won 2-0 | +181520 |
| 5sealed | 128 | Muir, Justin (1443) | Won 2-0 | +161536 |
| 6sealed | 122 | Forte, Nathan (1571) | Won 2-1 | +191555 |
| 7sealed | 24 | Durward, Caleb (1786) | Lost 0-2 | -141541 |
| 8sealed | 99 | Austin B., (1557) | Won 2-1 | +181559 |
| 9sealed | 8 | Hall, Wesley (1551) | Won 2-1 | +181577 |
| 10draft | 11 | Gherman, Octavian (1605) | Won 2-0 | +191596 |
| 11draft | 47 | Glantzman, Joshua (1711) | Lost 0-2 | -161580 |
| 12draft | 45 | Baugh, Jacob (1644) | Lost 1-2 | -171563 |
| 13draft | 7 | Gonzalez, Phillip (1657) | Won 2-1 | +201583 |
| 14draft | 27 | Wyant, Aaron (1631) | Won 2-0 | +181601 |
| 15draft | 21 | Jones, Nathan [USA] (1579) | Lost 0-2 | -181583 |
| top | average opponent: 1625record: 10-5 | new rating: 1583 | ||
| Grand Prix Atlanta 2012 (legacy) | starting rating: 1400 | |||
| round | table | opponent (rating) | result | Δrating |
| 1legacy | 72 | Redfern, Jacob (1392) | Won 2-0 | +181418 |
| 2legacy | 109 | Tidd, Brendan (1484) | Won 2-1 | +191437 |
| 3legacy | 80 | Najman, Adam (1537) | Won 2-1 | +201457 |
| 4legacy | 87 | Rittiner, Joe (1488) | Lost 1-2 | -171440 |
| 5legacy | 207 | Herr, Shawn (1376) | Won 2-0 | +171457 |
| 6legacy | 97 | Wright, Joel (1620) | Won 2-1 | +211478 |
| 7legacy | 82 | Ochoa, David (1860) | Lost 1-2 | -121466 |
| 8legacy | 81 | Hoey, Matthew (1713) | Lost 1-2 | -131453 |
| 9legacy | 146 | Rich, Jeremy (1534) | Won 2-0 | +191472 |
| top | average opponent: 1556record: 6-3 | new rating: 1472 | ||
| Grand Prix Baltimore 2012 (DKA standard) | starting rating: 1414 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 29 | Wines, Casey (1500) | Won 2-0 | +191433 |
| 2standard | 209 | Holland, Patrick (1500) | Lost 0-2 | -171416 |
| 3standard | 465 | Partridge, Tommy (1368) | Lost 1-2 | -181398 |
| 4standard | 605 | Price, Greg (1499) | Won 2-0 | +191417 |
| 5standard | 446 | York, Steve (1471) | Lost 0-2 | -171400 |
| top | average opponent: 1467record: 2-3 | new rating: 1400 | ||
| Grand Prix Kansas City 2011 (NPH limited) | starting rating: 1444 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 31 | Blanchard, Wes (1608) | Lost 0-2 | -151429 |
| 3sealed | 284 | Emfinger, Stacy (1466) | Won 2-0 | +181447 |
| 4sealed | 164 | Betts, Dustin (1506) | Lost 1-2 | -171430 |
| 5sealed | 235 | Daily, Alex (1502) | Lost 1-2 | -161414 |
| top | average opponent: 1520record: 1-3 | new rating: 1414 | ||
| Grand Prix Washington DC 2010 (ROE standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 714 | Feeley, Sam (1469) | Lost 1-2 | -191481 |
| 2standard | 872 | Lynch, Chris (1483) | Lost 1-2 | -181463 |
| 3standard | 1013 | Merrill, Kenny (1364) | Lost 0-2 | -191444 |
| top | average opponent: 1439record: 0-3 | new rating: 1444 | ||