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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Richard Wilcox | 1.149 | 2004-2013 | |
| 2 | Bartholomew Bailey | 1.126 | 2018-2026 | |
| 3 | António Cordero | 1.117 | 2039-2046 | |
| 4 | Francisco Ruíz | 1.115 | 2016-2031 | |
| 5 | Morris Pennebaker* | 1.114 | 1989-2007 | |
| 6 | Al Jones* | 1.108 | 2003-2019 | |
| 7 | Johnnie Iraq* | 1.107 | 1992-2009 | |
| 7 | Roberto Miranda | 1.107 | 2019-2036 | |
| 9 | Billy Ashley | 1.100 | 1993-2009 | |
| 10 | José Escarceja | 1.098 | 2020-2027 | |
| 11 | Sadaharu Oh, Jr. | 1.085 | 1989-2006 | |
| 12 | Pat Curry | 1.084 | 2006-2018 | |
| 13 | Aloysius Gonzaga | 1.082 | 2030-2040 | |
| 14 | Mark Paul Gosselaar | 1.079 | 1995-2007 | |
| 15 | Niguel Halime | 1.077 | 1998-2010 | |
| 16 | Joey Rosko | 1.075 | 2014-2026 | |
| 17 | Eric Rouse | 1.073 | 2001-2014 | |
| 17 | Chris Bradford | 1.073 | 2010-2022 | |
| 17 | Billy Beauford | 1.073 | 2007-2023 | |
| 20 | Weston Fitzpatrick | 1.068 | 2010-2025 | |
| 21 | Lee O'Herlihy | 1.067 | 2007-2020 | |
| 22 | Iran Brito | 1.065 | 2020-2030 | |
| 23 | Guam Fantomhorsfli | 1.063 | 1989-2004 | |
| 23 | Emílio Rodríguez* | 1.063 | 2016-2034 | |
| 25 | Christian Martorell | 1.062 | 1994-2008 | |
| 25 | Tim Wallace | 1.062 | 2007-2014 | |
| 27 | Steve Jefferson | 1.058 | 2026-2039 | |
| 28 | Casey Martin | 1.054 | 1998-2006 | |
| 29 | Pat Clark | 1.051 | 2003-2014 | |
| 30 | Ross White* | 1.048 | 1997-2009 | |
| 30 | Tomás Guillén# | 1.048 | 2041-2051 | |
| 30 | Gilberto Pacheco | 1.048 | 2016-2031 | |
| 33 | Dennis French* | 1.047 | 2037-2056 | |
| 34 | Thad Meyer | 1.046 | 2034-2045 | |
| 35 | Tom Rudge# | 1.043 | 2038-2058 | |
| 35 | Bob White | 1.043 | 2009-2023 | |
| 37 | Josh Mesh | 1.042 | 2047-2056 | |
| 38 | Mark Stuart | 1.038 | 2020-2035 | |
| 38 | Juan Donéstevez# | 1.038 | 2042-2058 | |
| 40 | Mitch Dalrymple | 1.037 | 2034-2043 | |
| 41 | Michael Hampton | 1.036 | 2008-2018 | |
| 42 | Aaron Haney# | 1.035 | 2040-2058 | |
| 43 | Medric Wood | 1.032 | 1985-2005 | |
| 43 | Millard Younger | 1.032 | 2038-2051 | |
| 43 | Ralph Benson | 1.032 | 2018-2034 | |
| 43 | Mike Clarke* | 1.032 | 1989-2006 | |
| 47 | André Ly# | 1.031 | 2040-2058 | |
| 47 | Aubrey Anderson | 1.031 | 2030-2038 | |
| 49 | Alfredo Martínez* | 1.030 | 2024-2041 | |
| 50 | Kazunari Chikafuji# | 1.029 | 2051-2058 | |
| 50 | Mario Balderas | 1.029 | 2027-2039 | |
| 50 | Ángel González# | 1.029 | 2039-2058 | |
| 53 | Luis Tejeda | 1.028 | 2020-2034 | |
| 54 | Allen Hall | 1.027 | 2012-2026 | |
| 55 | Chet Gabriel | 1.026 | 2030-2039 | |
| 56 | Luis Maldonado | 1.025 | 2034-2047 | |
| 57 | Orlando Martínez | 1.024 | 2000-2011 | |
| 57 | José Estrada | 1.024 | 2029-2042 | |
| 59 | Jorge Martínez | 1.023 | 2023-2035 | |
| 59 | Fernando Moreno# | 1.023 | 2040-2058 | |
| 61 | Alexander Julyan | 1.021 | 2042-2056 | |
| 61 | Yi-lin She | 1.021 | 2004-2015 | |
| 63 | Aires Penharanda | 1.020 | 2041-2057 | |
| 63 | Sam Hamm | 1.020 | 1992-2005 | |
| 63 | Martín Félix | 1.020 | 2011-2029 | |
| 66 | Austin Gibson | 1.019 | 2006-2020 | |
| 67 | Okyay Nisancî# | 1.018 | 2048-2058 | |
| 68 | Tom Mohler | 1.016 | 1992-2004 | |
| 69 | Antoine Haddad | 1.015 | 2010-2021 | |
| 70 | Rich Ayers | 1.013 | 2028-2037 | |
| 71 | Ad Collins | 1.012 | 1999-2006 | |
| 72 | Arthur Norris | 1.011 | 2027-2038 | |
| 73 | Bronx Cortez# | 1.009 | 2044-2057 | |
| 74 | Robert Gowron | 1.007 | 2030-2039 | |
| 75 | Qadir bin Gamal# | 1.006 | 2051-2058 | |
| 76 | Mark White | 1.005 | 2035-2052 | |
| 77 | Stewart Illingworth# | 1.004 | 2041-2058 | |
| 77 | Kevin MacKeith | 1.004 | 2037-2042 | |
| 77 | Doug Kendall | 1.004 | 2020-2032 | |
| 80 | Manobu Shimizu# | 1.003 | 2041-2058 | |
| 80 | José Machado | 1.003 | 2038-2046 | |
| 82 | Carlos Gonzáles* | 1.001 | 2028-2043 | |
| 83 | Kelly Benson | 1.000 | 1994-2005 | |
| 83 | Manuel Rodríguez | 1.000 | 2024-2032 | |
| 85 | Cinema Jones# | 0.999 | 2044-2058 | |
| 86 | Brett White | 0.998 | 2037-2048 | |
| 86 | Robert Harrell | 0.998 | 2001-2016 | |
| 88 | José Romero# | 0.997 | 2044-2058 | |
| 88 | Paul Holden | 0.997 | 2022-2031 | |
| 88 | Fernando Castillo# | 0.997 | 2040-2058 | |
| 91 | Chris Thomas# | 0.996 | 2047-2056 | |
| 91 | José Hurtado | 0.996 | 2047-2057 | |
| 91 | Mike Campbell | 0.996 | 2038-2055 | |
| 94 | Todd Clay | 0.995 | 2009-2023 | |
| 95 | Francisco Liriano | 0.994 | 2019-2031 | |
| 96 | Nazeeh Ragheb# | 0.993 | 2048-2058 | |
| 96 | Jeffrey Smith# | 0.993 | 2039-2058 | |
| 96 | Tommy Bailey | 0.993 | 2047-2052 | |
| 99 | Martin Hemming# | 0.992 | 2047-2058 | |
| 99 | Stanley R. Perimutter | 0.992 | 2033-2039 |
