Preston, Zach
Current rating: 1534
Record: 33-27-1 (GP) / 1-5 (professional)
| Grand Prix Los Angeles 2016 (modern) | starting rating: 1576 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 24 | Gibbons, Aaron (1500) | Lost 0-2 | -201556 |
| 2modern | 734 | Price, Steven (1481) | Won 2-0 | +171573 |
| 3modern | 534 | Marentes, Oscar (1490) | Lost 0-2 | -191554 |
| 4modern | 814 | Martinez, Steven (1482) | Lost 1-2 | -201534 |
| top | average opponent: 1488record: 1-3 | new rating: 1534 | ||
| Grand Prix Portland 2013 (modern) | starting rating: 1554 | |||
| round | table | opponent (rating) | result | Δrating |
| 1modern | 240 | Sims, Jamal (1486) | Won 2-1 | +171571 |
| 2modern | 168 | Barakat, Allonte (1518) | Won 2-0 | +171588 |
| 3modern | 28 | Brown, Alex (1636) | Lost 0-2 | -181570 |
| 4modern | 225 | Leske, Brandon (1539) | Won 2-1 | +181588 |
| 5modern | 240 | Warkentin, Benjamin (1503) | Won 2-0 | +161604 |
| 6modern | 25 | Hampton, Jesse (1833) | Lost 0-2 | -141590 |
| 7modern | 138 | Smith, Robert RC (1780) | Lost 0-2 | -141576 |
| top | average opponent: 1614record: 4-3 | new rating: 1576 | ||
| Grand Prix Columbus 2012 (modern) | starting rating: 1578 | |||
| round | table | opponent (rating) | result | Δrating |
| 3modern | 149 | Henderson, Corey (1581) | Won 2-0 | +181596 |
| 4modern | 300 | Lavender, Ben (1488) | Lost 0-2 | -201576 |
| 5modern | 138 | King, Ryan T (1549) | Won 2-0 | +171593 |
| 6modern | 85 | Medina, Jonathan D (1533) | Lost 1-2 | -191574 |
| 7modern | 171 | Costantini, Mark (1432) | Lost 0-2 | -201554 |
| top | average opponent: 1516record: 2-3 | new rating: 1554 | ||
| Grand Prix Seattle-Tacoma 2012 (DKA limited) | starting rating: 1604 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 33 | Thomson, Brandon (1444) | Won 2-0 | +161620 |
| 3sealed | 156 | Havas, Chad (1564) | Won 2-0 | +171637 |
| 4sealed | 8 | Light, Russ A (1500) | Lost 1-2 | -211616 |
| 5sealed | 184 | Woo, Elliott (1572) | Lost 1-2 | -191597 |
| 6sealed | 223 | PAGEL, TRAVIS J (1521) | Lost 0-2 | -191578 |
| top | average opponent: 1520record: 2-3 | new rating: 1578 | ||
| Grand Prix Austin 2012 (ISD limited) | starting rating: 1503 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 212 | Hubble, Bryan (1722) | Lost 0-2 | -141489 |
| 3sealed | 350 | Walker, Jeremy (1501) | Won 2-1 | +181507 |
| 4sealed | 250 | Manuel, Devin (1430) | Won 2-0 | +171524 |
| 5sealed | 219 | Chapman, Jack (1549) | Won 2-0 | +181542 |
| 6sealed | 68 | Hendrickson, Mark (1630) | Won 2-1 | +201562 |
| 7sealed | 57 | Bonura, Matthew J (1578) | Won 2-1 | +181580 |
| 8sealed | 28 | Davis, Dustin (1621) | Won 2-0 | +191599 |
| 9sealed | 19 | Cao, William (1578) | Won 2-0 | +181617 |
| 10draft | 42 | Barrentine, Scott (1741) | Lost 0-2 | -161601 |
| 11draft | 23 | Odorizzi, Christopher (1594) | Won 2-1 | +181619 |
| 12draft | 27 | Magelssen, Josh (1613) | Lost 0-2 | -181601 |
| 13draft | 3 | Afable, Coco B (1668) | Draw 1-1 | +11602 |
| 14draft | 38 | Mayer, Kevin (1706) | Lost 1-2 | -161586 |
| 15draft | 43 | Dunks, Jess (1620) | Won 2-0 | +181604 |
| top | average opponent: 1611record: 9-4-1 | new rating: 1604 | ||
| Pro Tour Nagoya 2011 (Scars block) | starting rating: 1562 | |||
| round | table | opponent (rating) | result | Δrating |
| 1block | 125 | Yu, Pi Hsiang (1635) | Lost 0-2 | -171545 |
| 2block | 167 | Ikawa, Yoshihiko (1738) | Lost 0-2 | -151530 |
| 3block | 162 | Andreasen, Dennis (1686) | Won 2-0 | +211551 |
| 4block | 151 | Niwa, Kohei (1453) | Lost 0-2 | -201531 |
| 5block | 144 | Ootsuka, Koutarou (1768) | Lost 1-2 | -131518 |
| 6draft | 106 | Inoue, Toru (1722) | Lost 0-2 | -151503 |
| top | average opponent: 1667record: 1-5 | new rating: 1503 | ||
| Grand Prix Oakland 2010 (extended) | starting rating: 1622 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 59 | Fukushima, Shungo (1487) | Lost 0-2 | -201602 |
| 2extended | 289 | Yoo, Ki-hyun (1491) | Lost 0-2 | -201582 |
| 3extended | 280 | Kruse, Travis (1466) | Lost 0-2 | -201562 |
| top | average opponent: 1482record: 0-3 | new rating: 1562 | ||
| Grand Prix Seattle 2009 (ARB standard) | starting rating: 1610 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 101 | Korlin, Greg (1500) | Won 2-0 | +161626 |
| 2standard | 265 | Johnston, Damon (1380) | Lost 0-2 | -221604 |
| 3standard | 390 | Patton, Stan N (1486) | Won 2-0 | +151619 |
| 4standard | 280 | Haney, Logan C (1518) | Won 2-0 | +171636 |
| 5standard | 108 | Sacher, AJ (1688) | Won 2-1 | +191655 |
| 6standard | 103 | Ruess, Jan (1851) | Lost 1-2 | -151640 |
| 7standard | 122 | Clay, Ellis (1639) | Lost 1-2 | -181622 |
| top | average opponent: 1580record: 4-3 | new rating: 1622 | ||
| Grand Prix Los Angeles 2009 (extended) | starting rating: 1597 | |||
| round | table | opponent (rating) | result | Δrating |
| 1extended | 210 | Gonzales, Gilbert (1500) | Won 2-0 | +171614 |
| 2extended | 31 | Balla, John (1689) | Lost 0-2 | -171597 |
| 3extended | 222 | Ho, Wilson (1499) | Won 2-1 | +161613 |
| 4extended | 147 | Anguiano, Ian (1519) | Won 2-1 | +171630 |
| 5extended | 107 | Lafleur, Collin (1603) | Lost 1-2 | -191611 |
| 6extended | 216 | Opferman, Anthony (1520) | Won 2-1 | +161627 |
| 7extended | 105 | Alepin, Alexandre (1661) | Lost 1-2 | -171610 |
| top | average opponent: 1570record: 4-3 | new rating: 1610 | ||
| Grand Prix Kansas City 2008 (ALA limited) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 145 | Polking, Nick N (1500) | Won 2-1 | +181518 |
| 2sealed | 106 | Crites, Jennifer J (1518) | Won 2-1 | +181536 |
| 3sealed | 32 | Scott, Stephen (1701) | Lost 0-2 | -151521 |
| 4sealed | 206 | Cohen, Brent (1517) | Won 2-0 | +181539 |
| 5sealed | 136 | Mohsin, Real (1533) | Lost 1-2 | -181521 |
| 6sealed | 137 | Houston, Shawn (1576) | Won 2-1 | +191540 |
| 7sealed | 131 | Beltran, Gabe J (1534) | Won 2-0 | +181558 |
| 8sealed | 43 | McGregor, Pat (1614) | Won 2-1 | +191577 |
| 9sealed | 63 | Marquis, Dustin (1724) | Won 2-0 | +201597 |
| top | average opponent: 1580record: 7-2 | new rating: 1597 | ||