Jeffery, Jon
Current rating: 1713 (#5700)
Record: 39-27
| Grand Prix Vancouver 2018 (UMA limited) | starting rating: 1678 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 256 | Rachiero, Anthony (1533) | Won 2-1 | +151693 |
| 2sealed | 113 | Neilson, Eric (1546) | Won 2-1 | +151708 |
| 3sealed | 160 | Wisdom, Kenny (1504) | Won 2-0 | +151723 |
| 4sealed | 24 | Boehnlein, Dave (1608) | Won 2-0 | +161739 |
| 5sealed | 32 | Davoudi, Mani (2010) | Lost 0-2 | -131726 |
| 6sealed | 81 | Malcolm, Liam (1531) | Won 2-1 | +141740 |
| 7sealed | 31 | Elarar, Jay (1882) | Lost 1-2 | -151725 |
| 8sealed | 87 | Tsang, Bill (1740) | Won 2-0 | +181743 |
| 9sealed | 77 | Sherman, Sam (1985) | Lost 0-2 | -141729 |
| 10draft | 15 | Kubo, Eric (1674) | Lost 0-2 | -191710 |
| 11draft | 27 | Wu, Gavin (1547) | Won 2-0 | +151725 |
| 12draft | 32 | Weitz, Benjamin (1983) | Lost 1-2 | -131712 |
| 13draft | 28 | Mok, Wilson (1971) | Won 2-0 | +221734 |
| 14draft | 53 | Dvorshak, Darik (1562) | Lost 0-2 | -211713 |
| top | average opponent: 1720record: 8-6 | new rating: 1713 | ||
| Grand Prix Vancouver 2017 (modern) | starting rating: 1661 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 2266 | Bedell, Rodney (1509) | Won 2-1 | +151676 |
| 4modern | 2100 | Bianchi, Alex (1781) | Won 2-0 | +201696 |
| 5modern | 2016 | Henriksen, Matt (1659) | Won 2-1 | +171713 |
| 6modern | 2027 | Job, Jonathan (1840) | Won 2-1 | +211734 |
| 7modern | 2002 | Rosin, Thomas (1577) | Won 2-0 | +151749 |
| 8modern | 2006 | Utter-Leyton, Josh (1946) | Lost 1-2 | -151734 |
| 9modern | 2011 | Hare, Ryan (1876) | Lost 1-2 | -151719 |
| 10modern | 2056 | Pasdernick, Cody (1602) | Won 2-0 | +161735 |
| 11modern | 2031 | Alter, Scott (1880) | Won 2-0 | +201755 |
| 12modern | 2027 | Kellett, William (1555) | Lost 0-2 | -211734 |
| 13modern | 2028 | Reid, Jordan (1576) | Lost 1-2 | -211713 |
| 14modern | 2072 | Jansen, Adam (1903) | Lost 1-2 | -151698 |
| 15modern | 2077 | Hoser, Eric (1549) | Lost 1-2 | -201678 |
| top | average opponent: 1712record: 7-6 | new rating: 1678 | ||
| Grand Prix Vancouver 2016 (OGW limited) | starting rating: 1571 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 738 | Carico, Evan (1500) | Won 2-0 | +171588 |
| 2sealed | 126 | Klonowski, Joseph (1518) | Won 2-0 | +171605 |
| 3sealed | 107 | Ermoshkin, Vladimir (1536) | Won 0-0 | +161621 |
| 4sealed | 153 | Broadstone, Benjamin (1698) | Lost 0-2 | -161605 |
| 5sealed | 347 | Clark, Ken (1564) | Won 2-1 | +171622 |
| 6sealed | 121 | Pare, Jean-Michel (1569) | Won 2-0 | +171639 |
| 7sealed | 56 | Syed, Zan (1947) | Won 2-1 | +241663 |
| 8sealed | 38 | Thron, Nunzio (1714) | Lost 0-2 | -171646 |
| 9sealed | 122 | Riecken, Steven (1821) | Won 2-1 | +211667 |
| 10draft | 70 | Sellers, Michael (1642) | Won 2-1 | +171684 |
| 11draft | 17 | Brounstein, Jeremy (1612) | Lost 0-2 | -191665 |
| 12draft | 65 | Ayalde, Francis (1614) | Lost 1-2 | -191646 |
| 13draft | 26 | Born, Craig (1581) | Won 2-0 | +171663 |
| 14draft | 22 | Sundholm, Peter (1660) | Lost 0-2 | -181645 |
| 15draft | 22 | Mummery, Ryan (1545) | Won 2-1 | +161661 |
| top | average opponent: 1635record: 10-5 | new rating: 1661 | ||
| Grand Prix Vancouver 2015 (modern) | starting rating: 1550 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 26 | Peterson, Sean (1714) | Won 2-0 | +211571 |
| 4modern | 65 | Vance, James (1695) | Lost 1-2 | -161555 |
| 5modern | 88 | Tauber, Mykel (1494) | Lost 0-2 | -191536 |
| 6modern | 241 | Yu, Yonghuan (1498) | Lost 0-2 | -191517 |
| 7modern | 237 | Eastwood, Chris (1499) | Won 2-0 | +181535 |
| 8modern | 166 | Wells, Vern (1490) | Won 2-1 | +171552 |
| 9modern | 130 | Veres, Devan (1623) | Won 2-1 | +191571 |
| top | average opponent: 1573record: 4-3 | new rating: 1571 | ||
| Grand Prix Vancouver 2014 (THS standard) | starting rating: 1557 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 135 | Laing, Malcolm (1500) | Won 2-0 | +171574 |
| 2standard | 197 | Grant, Brian (1488) | Won 2-0 | +161590 |
| 3standard | 78 | Brady, Corbin (1536) | Lost 0-2 | -191571 |
| 4standard | 229 | Eterosa, John (1539) | Lost 1-2 | -181553 |
| 5standard | 275 | Maguire, Jared (1612) | Lost 0-2 | -171536 |
| 6standard | 319 | Clark, Ben (1436) | Won 2-1 | +161552 |
| 7standard | 247 | Lee, Ronnie (1482) | Won 2-1 | +171569 |
| 8standard | 156 | Maclean, Elliot (1526) | Lost 1-2 | -191550 |
| top | average opponent: 1515record: 4-4 | new rating: 1550 | ||
| Grand Prix Vancouver 2012 (AVR limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 191 | Tonner, Gordon (1500) | Won 2-0 | +181518 |
| 2sealed | 142 | Liu, Raymond (1518) | Lost 0-2 | -181500 |
| 3sealed | 187 | Lee, Benjamin (1506) | Lost 1-2 | -181482 |
| 4sealed | 284 | Pak, Johnny (1486) | Won 2-0 | +181500 |
| 5sealed | 222 | Clark, Scott (1434) | Won 2-0 | +171517 |
| 6sealed | 232 | Macinnis, Tim (1518) | Lost 0-2 | -181499 |
| 7sealed | 216 | DeRoo, Steven (1499) | Won 2-1 | +181517 |
| 8sealed | 140 | Rider, Justin (1659) | Won 2-1 | +211538 |
| 9sealed | 120 | Ho, Minh-duc (1600) | Won 2-1 | +191557 |
| top | average opponent: 1524record: 6-3 | new rating: 1557 | ||