Hammack, Jon
Current rating: 1770 (#3096)
Record: 47-29-3 (GP) / 3-4-1 (professional)
| Grand Prix Oklahoma City 2015 (modern) | starting rating: 1795 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 446 | Gandall, Greg (1487) | Won 2-1 | +121807 |
| 2modern | 156 | Truong, Andy (1656) | Won 2-1 | +151822 |
| 3modern | 1021 | Cooper, Russell 2 (1504) | Won 0-0 | +131835 |
| 4modern | 80 | McDonald, Chance (1603) | Won 2-0 | +141849 |
| 5modern | 6 | Nagro, Jacob (1804) | Lost 1-2 | -191830 |
| 6modern | 123 | Herrell, Justin (1718) | Lost 0-2 | -201810 |
| 7modern | 254 | Tenjum, Andrew (1865) | Lost 1-2 | -171793 |
| 8modern | 1020 | Nguyen, Tai (1521) | Lost 0-2 | -231770 |
| top | average opponent: 1645record: 4-4 | new rating: 1770 | ||
| Grand Prix Oklahoma City 2013 (THS limited) | starting rating: 1732 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 238 | Allen III, John (1518) | Won 2-0 | +151747 |
| 4sealed | 146 | Makin, Nick (1466) | Won 2-0 | +131760 |
| 5sealed | 154 | King, Jeremy (1634) | Lost 0-2 | -211739 |
| 6sealed | 181 | Rietzl, Paul (1822) | Won 2-1 | +201759 |
| 7sealed | 141 | Hwang, Eugene (1539) | Lost 1-2 | -221737 |
| 8sealed | 200 | Jarman, Jimmy (1466) | Won 2-1 | +131750 |
| 9sealed | 189 | Prost, Andrejs (1893) | Won 2-0 | +211771 |
| 10draft | 31 | Connell, Zoe (1659) | Won 2-1 | +161787 |
| 11draft | 61 | Riecks, Matthew (1750) | Won 2-1 | +171804 |
| 12draft | 12 | King, Jeremy (1688) | Lost 1-2 | -201784 |
| 13draft | 59 | Justinianes, Isaias (1617) | Lost 1-2 | -211763 |
| 14draft | 15 | Alldredge, Aaron (1614) | Won 2-1 | +151778 |
| 15draft | 26 | Berni, Roberto (1697) | Won 2-1 | +171795 |
| top | average opponent: 1643record: 9-4 | new rating: 1795 | ||
| Grand Prix Kansas City 2013 (modern) | starting rating: 1710 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 82 | Dalton, Andrew (1485) | Won 2-1 | +141724 |
| 4modern | 43 | Miller, Stefan (1500) | Draw 1-1 | -41720 |
| 5modern | 67 | Mann, Stephen (2049) | Lost 1-2 | -121708 |
| 6modern | 145 | Palo, Alyxx (1485) | Lost 0-2 | -221686 |
| 7modern | 212 | Weil, Alan (1484) | Won 2-1 | +141700 |
| 8modern | 47 | Stewart, Edward (1563) | Won 2-0 | +161716 |
| 9modern | 100 | Zachow, Andrew (1639) | Won 2-0 | +161732 |
| top | average opponent: 1601record: 4-2-1 | new rating: 1732 | ||
| Grand Prix Las Vegas 2013 (MMA limited) | starting rating: 1665 | |||
| round | table | opponent (rating) | result | Δrating |
| 3sealed | 54 | Kagey, Henry (1536) | Lost 0-2 | -211644 |
| 4sealed | 54 | Marmulstein, Rion (1663) | Won 2-1 | +191663 |
| 5sealed | 54 | Allison, Seth (1573) | Won 2-0 | +161679 |
| 6sealed | 54 | Davila, Gilbert (1519) | Won 2-0 | +151694 |
| 7sealed | 54 | Li, Chen (1839) | Lost 1-2 | -151679 |
| 8sealed | 54 | Phan, Tuan (1493) | Won 2-1 | +151694 |
| 9sealed | 54 | Masters, Preston (1589) | Won 2-0 | +161710 |
| 10draft | 221 | Dykes, James (1736) | Won 2-0 | +181728 |
| 11draft | 33 | Colker, Nathan (1660) | Lost 0-2 | -191709 |
| 12draft | 109 | Lovett, Nicholas (1672) | Won 2-0 | +171726 |
| 13draft | 79 | Starleaf, Derek (1833) | Lost 0-2 | -161710 |
| top | average opponent: 1647record: 7-4 | new rating: 1710 | ||
| Grand Prix Denver 2013 (legacy) | starting rating: 1649 | |||
| round | table | opponent (rating) | result | Δrating |
| 3legacy | 21 | Vergo, Eric (1517) | Won 2-0 | +161665 |
| 4legacy | 36 | Yost, Austin (1576) | Won 2-1 | +161681 |
| 5legacy | 49 | Thompson, Gerry (1925) | Lost 1-2 | -141667 |
| 6legacy | 58 | Marriott, Nick (1493) | Lost 1-2 | -211646 |
| 7legacy | 117 | Ruprecht, Adam (1754) | Won 2-1 | +201666 |
| 8legacy | 51 | Nemeth, Mark (1593) | Draw 1-1 | -11665 |
| top | average opponent: 1643record: 3-2-1 | new rating: 1665 | ||
| Grand Prix San Antonio 2012 (RTR standard) | starting rating: 1570 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 70 | Colton, William (1451) | Won 2-0 | +161586 |
| 3standard | 4 | Leza, Eddie (1589) | Won 2-0 | +181604 |
| 4standard | 34 | McKenzie, Chadwick (1595) | Won 2-1 | +171621 |
| 5standard | 12 | Sewell, Matthew (1607) | Lost 1-2 | -181603 |
| 6standard | 74 | Rutledge, Jamie (1609) | Won 2-1 | +181621 |
| 7standard | 51 | Beckert, Justin (1576) | Won 2-1 | +171638 |
| 8standard | 19 | Edel, Willy (2071) | Won 2-1 | +261664 |
| 9standard | 14 | Swift, Orrin (1498) | Won 2-1 | +151679 |
| 10standard | 5 | Boyette, Wesley (1641) | Lost 1-2 | -191660 |
| 11standard | 19 | Dawson, Christian (1621) | Won 2-0 | +171677 |
| 12standard | 8 | Luthy, Paul W (1554) | Lost 0-2 | -201657 |
| 13standard | 16 | Chapin, Patrick (1854) | Won 2-0 | +221679 |
| 14standard | 15 | Ta, Tu (1744) | Lost 1-2 | -171662 |
| 15standard | 19 | Froehlich, Eric (1943) | Lost 0-2 | -131649 |
| top | average opponent: 1668record: 9-5 | new rating: 1649 | ||
| Pro Tour Avacyn Restored (Innistrad block) | starting rating: 1564 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 147 | Jonassen, Kristoffer (1668) | Lost 0-2 | -171547 |
| 2block | 185 | Mohr, Christopher (1489) | Draw 1-1 | -11546 |
| 3block | 142 | Meoni, Stefano (1510) | Won 2-0 | +181564 |
| 4block | 94 | Dougherty, Robert (1915) | Lost 0-2 | -121552 |
| 5block | 131 | Cuneo, Andrew (1935) | Lost 1-2 | -111541 |
| 6draft | 146 | Crewe, David (1837) | Won 2-0 | +231564 |
| 7draft | 37 | Benaets, Kristof (1698) | Won 2-0 | +201584 |
| 8draft | 95 | Magnan, Bronson (1777) | Lost 0-2 | -141570 |
| top | average opponent: 1729record: 3-4-1 | new rating: 1570 | ||
| Grand Prix Salt Lake City 2012 (DKA standard) | starting rating: 1546 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 63 | Adamson, Ariel (1534) | Won 2-1 | +181564 |
| 4standard | 97 | Chen, Kent (1506) | Lost 0-2 | -191545 |
| 5standard | 175 | Rodriguez, Karl A (1501) | Won 2-0 | +171562 |
| 6standard | 92 | Lane, Jay (1539) | Won 2-0 | +171579 |
| 7standard | 46 | Funatsu, Hirotsugu (1589) | Won 2-0 | +191598 |
| 8standard | 43 | White, Michael S (1585) | Lost 0-2 | -191579 |
| 9standard | 47 | Yarrow, Ivy (1700) | Lost 0-2 | -151564 |
| top | average opponent: 1565record: 4-3 | new rating: 1564 | ||
| Grand Prix Austin 2012 (ISD limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 161 | Shaver, Robert (1447) | Won 2-0 | +171517 |
| 3sealed | 77 | Lewis, Aaron (1714) | Won 2-1 | +211538 |
| 4sealed | 49 | Berni, Roberto (1689) | Lost 1-2 | -151523 |
| 5sealed | 99 | Hu, Haibing (1810) | Lost 0-2 | -131510 |
| 6sealed | 217 | Plunkett, Dillon (1483) | Lost 0-2 | -181492 |
| 7sealed | 248 | Cirtans, Greg A (1450) | Won 2-0 | +171509 |
| 8sealed | 206 | Wredberg, Gregory (1514) | Won 2-1 | +181527 |
| 9sealed | 140 | Lachaud, Remy (1578) | Won 2-0 | +191546 |
| top | average opponent: 1585record: 5-3 | new rating: 1546 | ||
| Grand Prix Dallas-Fort Worth 2011 (MBS standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 287 | Mikiel, Jeffrey (1500) | Draw 1-1 | 01500 |
| 2standard | 96 | Hosler, Wade E (1498) | Won 2-0 | +181518 |
| 3standard | 172 | Martinez, Mason (1518) | Won 2-1 | +181536 |
| 4standard | 166 | Southerlin, Michael (1536) | Lost 0-2 | -181518 |
| 5standard | 258 | J, Jonathan (1505) | Lost 0-1 | -181500 |
| top | average opponent: 1511record: 2-2-1 | new rating: 1500 | ||