Lee, Jefferson
Current rating: 1693
Record: 51-37-2 (GP) / 7-9 (professional)
| Grand Prix Brisbane 2019 (ELD standard) | starting rating: 1754 | |||
| round | table | opponent (rating) | result | Δrating |
| 1standard | 20 | Pour, Joe (1500) | Won 2-1 | +131767 |
| 2standard | 59 | Andrews, Fraser (1517) | Won 2-0 | +141781 |
| 3standard | 40 | Pearce, Andrew [NZL] (1538) | Won 2-0 | +131794 |
| 4standard | 16 | Mulcahy, Luke (1889) | Lost 1-2 | -161778 |
| 5standard | 31 | Clarke, Trent (1678) | Won 2-0 | +161794 |
| 6standard | 14 | Blinov, Vladislav (1555) | Lost 1-2 | -221772 |
| 7standard | 85 | Zhang, James (1899) | Won 2-0 | +201792 |
| 8standard | 55 | Liu, Calvin (1632) | Won 2-1 | +151807 |
| 9standard | 35 | Hilario, Jose Gabriel (1640) | Lost 1-2 | -211786 |
| 10standard | 34 | Adams-Bedford, Joel (1534) | Lost 0-2 | -221764 |
| 11standard | 34 | Nimwegen, Brendan (1505) | Lost 0-2 | -231741 |
| 12standard | 35 | Kelly, John-Paul (1659) | Won 2-0 | +171758 |
| 13standard | 33 | Barnes, Matthew [AUS] (1505) | Lost 0-2 | -231735 |
| 14standard | 31 | Harmer, Mitchell (1548) | Lost 1-2 | -211714 |
| 15standard | 34 | Maher, Samuel (1576) | Lost 1-2 | -211693 |
| top | average opponent: 1612record: 7-8 | new rating: 1693 | ||
| Grand Prix Sydney 2019 (RNA limited) | starting rating: 1820 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 17 | Nguyen, Nam [AUS] (1520) | Won 2-1 | +131833 |
| 3sealed | 8 | Zhang, James (1927) | Won 2-0 | +201853 |
| 4sealed | 32 | Puszet, Jarron (1837) | Lost 0-2 | -191834 |
| 5sealed | 87 | Nakamura, Shuhei (2004) | Won 2-0 | +211855 |
| 6sealed | 40 | Mulcahy, Luke (1810) | Lost 1-2 | -181837 |
| 7sealed | 46 | Ashton, David (1684) | Won 2-1 | +151852 |
| 8sealed | 41 | Larsen-Scott, James (1769) | Won 2-0 | +161868 |
| 9sealed | 30 | Sparks, Chris (1876) | Won 2-1 | +181886 |
| 10draft | 32 | Rasmussen, Timothy (1571) | Lost 1-2 | -231863 |
| 11draft | 14 | Garnham, Matthew (1725) | Lost 1-2 | -211842 |
| 12draft | 3 | James, Kurtis (1659) | Lost 1-2 | -211821 |
| 13draft | 30 | Sornphiphatphong, Chanond (1562) | Lost 0-2 | -231798 |
| 14draft | 43 | Sales, Mark (1513) | Lost 1-2 | -231775 |
| 15draft | 19 | Cheng, Nicholas (1576) | Lost 1-2 | -211754 |
| top | average opponent: 1717record: 6-8 | new rating: 1754 | ||
| Grand Prix Singapore 2018 (DOM standard) | starting rating: 1761 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 71 | Ilham, Ilham (1500) | Lost 0-2 | -231738 |
| 3standard | 251 | Foo, Wen Han (1590) | Won 2-1 | +161754 |
| 4standard | 196 | Wee, Wei Song Ray (1656) | Won 2-1 | +161770 |
| 5standard | 153 | Chye, Yian Hsiang (1943) | Won 2-1 | +211791 |
| 6standard | 48 | Law, Andriy (1640) | Won 2-1 | +151806 |
| 7standard | 20 | Lim, Zhong Yi (1955) | Lost 1-2 | -151791 |
| 8standard | 76 | Horikawa, Yuichi (1520) | Won 2-1 | +131804 |
| 9standard | 28 | Luo, Xi (1411) | Lost 1-2 | -251779 |
| 10standard | 49 | Ho, Ming Ho (1592) | Won 2-0 | +151794 |
| 11standard | 43 | Loo, Melvin (1573) | Won 2-1 | +141808 |
| 12standard | 38 | Payumo, Kristoffer (1691) | Won 2-0 | +161824 |
| 13standard | 15 | Okada, Tomoyuki (1634) | Won 2-0 | +151839 |
| 14standard | 14 | Chung, Syndy Sum (1820) | Lost 1-2 | -191820 |
| 15standard | 31 | Tan, Lun Yi (1811) | ID | 01820 |
| top | average opponent: 1667record: 9-4-1 | new rating: 1820 | ||
| Pro Tour Dominaria (DOM standard) | starting rating: 1779 | |||
| round | table | opponent (rating) | result | Δrating |
| 1draft | 63 | Berteaux, Julien (1866) | Won 2-0 | +201799 |
| 2draft | 64 | Pinto, Goncalo (1974) | Lost 1-2 | -151784 |
| 3draft | 63 | Carvalho, Marcio (2061) | Won 2-1 | +231807 |
| 4standard | 54 | Robb, Justin (1749) | Won 2-0 | +171824 |
| 5standard | 23 | Wiegersma, Jelger (1805) | Won 2-0 | +171841 |
| 6standard | 35 | Watsfeldt, Elias (2157) | Won 2-1 | +241865 |
| 7standard | 15 | Nagro, Jacob (2136) | Lost 0-2 | -131852 |
| 8standard | 23 | DiMaggio, Matthew (1838) | Won 2-0 | +181870 |
| 9draft | 3 | Murae, Ryuji (1933) | Lost 0-2 | -171853 |
| 10draft | 3 | Purpura, Gregory (1848) | Lost 0-2 | -181835 |
| 11draft | 3 | De Sio, Corrado (1813) | Won 2-1 | +171852 |
| 12standard | 29 | Ayers, Brandon (1933) | Lost 1-2 | -161836 |
| 13standard | 80 | Walker, Noah (2018) | Lost 1-2 | -151821 |
| 14standard | 100 | Stanley, Robert (1688) | Lost 0-2 | -201801 |
| 15standard | 112 | Wood, Keaton (1743) | Lost 0-2 | -191782 |
| 16standard | 103 | Wiboonthanasarn, Pirat (1650) | Lost 0-2 | -211761 |
| top | average opponent: 1888record: 7-9 | new rating: 1761 | ||
| Grand Prix Singapore 2017 (XLN limited) | starting rating: 1639 | |||
| round | table | opponent (rating) | result | Δrating |
| 2sealed | 110 | Oei, Henry (1491) | Won 2-0 | +161655 |
| 3sealed | 111 | Benskin, Iwan (1538) | Won 2-1 | +161671 |
| 4sealed | 57 | Praiwan, Thanakorn (1519) | Won 2-1 | +151686 |
| 5sealed | 21 | Yao, Shimeng (1751) | Won 2-1 | +191705 |
| 6sealed | 11 | Lau, Sam Lei Kang (1773) | Won 2-1 | +191724 |
| 7sealed | 7 | Nakamura, Shuhei (2072) | Won 2-0 | +241748 |
| 8sealed | 2 | Matsumoto, Yuki2978 (2077) | Won 2-0 | +241772 |
| 9sealed | 2 | Takaya, Kensuke (1730) | Lost 1-2 | -191753 |
| 10draft | 2 | Wentao, Qi (2027) | Won 2-0 | +231776 |
| 11draft | 81 | Inoue, Toru (2025) | Lost 0-2 | -131763 |
| 12draft | 24 | Kneepkens, Wouter (1608) | Lost 1-2 | -211742 |
| 13draft | 26 | Heng, Chye Hwee (1863) | Won 2-0 | +201762 |
| 14draft | 58 | Passin, Mathias (1811) | Won 2-1 | +191781 |
| 15draft | 58 | Ang, Clement (1713) | Won 2-1 | +171798 |
| Qdraft | Pan, Minxing (1765) | Lost 1-2 | -191779 | |
| top | average opponent: 1784record: 11-4 | new rating: 1779 | ||
| Grand Prix Manila 2017 (AKH standard) | starting rating: 1517 | |||
| round | table | opponent (rating) | result | Δrating |
| 2standard | 27 | Meneses, Kenneth (1589) | Won 2-0 | +201537 |
| 3standard | 89 | Intia, Joker (1470) | Won 2-1 | +171554 |
| 4standard | 28 | Inoue, Toru (1947) | Lost 0-2 | -121542 |
| 5standard | 75 | Tan, Erikson (1469) | Won 2-1 | +171559 |
| 6standard | 29 | Pagtakhan, Werick (1477) | Won 2-0 | +171576 |
| 7standard | 25 | Tacderas, Mark Angelo (1529) | Lost 1-2 | -191557 |
| 8standard | 503 | Sebastian, Jerrymie (1461) | Won 2-0 | +161573 |
| 9standard | 56 | O'Keefe, Mitchell (1674) | Won 2-0 | +201593 |
| 10standard | 41 | Au Yong, Wai Kin (1855) | Won 2-1 | +221615 |
| 11standard | 14 | Ozaki, Zax (1850) | Won 2-0 | +231638 |
| 12standard | 7 | Lim, Zhong Yi (2002) | Draw 1-1 | +61644 |
| 13standard | 13 | Hart, Jacob (1880) | Won 2-0 | +221666 |
| 14standard | 7 | Rama, Philip Christopher (1869) | Lost 0-2 | -141652 |
| 15standard | 13 | Wu, Kon Fai (1966) | Lost 1-2 | -131639 |
| top | average opponent: 1717record: 9-4-1 | new rating: 1639 | ||
| Grand Prix Sydney 2016 (EMN limited) | starting rating: 1550 | |||
| round | table | opponent (rating) | result | Δrating |
| 1sealed | 240 | Yeoh, Garry (1469) | Won 2-0 | +171567 |
| 2sealed | 28 | Xuan, Zhi Han (1590) | Won 2-0 | +181585 |
| 4sealed | 18 | Ellis, Dominic (1574) | Lost 0-2 | -181567 |
| 5sealed | 176 | Golding, Jacob (1652) | Lost 0-2 | -161551 |
| 6sealed | 182 | Zhang, Qiu Shi (1655) | Lost 1-2 | -161535 |
| 7sealed | 264 | Watson, Brendan (1582) | Lost 0-2 | -181517 |
| top | average opponent: 1587record: 2-4 | new rating: 1517 | ||
| Grand Prix Manila 2015 (KTK standard) | starting rating: 1500 | |||
| round | table | opponent (rating) | result | Δrating |
| 3standard | 76 | David, Ace York (1537) | Won 2-1 | +191519 |
| 4standard | 22 | Abubo, Johnson (1558) | Won 2-0 | +181537 |
| 5standard | 12 | Lanot, Gideon L (1544) | Lost 1-2 | -171520 |
| 6standard | 100 | De Leon, Ric Ryan (1556) | Won 2-1 | +181538 |
| 7standard | 58 | Cabrera, Michael Angelo (1571) | Won 2-1 | +191557 |
| 8standard | 26 | Ramos, Edsel (1601) | Won 2-0 | +191576 |
| 9standard | 7 | Tan, Jimmy G (1633) | Lost 0-2 | -171559 |
| 10standard | 40 | Soliveres, Roel (1569) | Lost 1-2 | -181541 |
| 11standard | 54 | Maglantay, Ranier (1668) | Won 2-1 | +201561 |
| 12standard | 30 | Wong, Christopher [HKG] (1610) | Lost 0-0 | -171544 |
| 13standard | 44 | Schafer, Ross (1760) | Won 2-0 | +221566 |
| 14standard | 39 | Kintanar, Celsus (1692) | Lost 0-2 | -161550 |
| 15standard | 43 | James, Nicholas (1564) | Draw 1-1 | 01550 |
| top | average opponent: 1605record: 7-5-1 | new rating: 1550 | ||