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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Billy Harrison# | .5651 | 1986 | |
| 2 | Millard Barr | .5493 | 1951 | |
| 3 | Chris Massey | .5466 | 1952 | |
| 4 | Brad Ford# | .5427 | 1986 | |
| 5 | Xavier López | .5417 | 1951 | |
| 6 | Mike Curry | .5363 | 1915 | |
| 7 | Héctor Palomarez# | .5331 | 1982 | |
| 8 | Jorge Ramírez# | .5329 | 1988 | |
| 9 | Paco Chávez# | .5278 | 1986 | |
| 10 | Jorge Relgio | .5251 | 1968 | |
| 11 | Gui-fan Ou | .5242 | 1986 | |
| 12 | Steve Weese | .5229 | 1913 | |
| 13 | Tierney Dubber | .5226 | 1962 | |
| 14 | Ken Almås# | .5221 | 1984 | |
| 15 | John Stout | .5219 | 1961 | |
| 15 | Roberto Chávez | .5219 | 1966 | |
| 17 | Santiago Vallejo# | .5217 | 1985 | |
| 18 | Luis Rosales | .5204 | 1942 | |
| 19 | Juan Peralta | .5197 | 1982 | |
| 19 | Perry Robinson# | .5197 | 1986 | |
| 21 | Konosuke Okada | .5172 | 1984 | |
| 22 | Juan Pérez# | .5170 | 1983 | |
| 23 | Jun-ho Park# | .5167 | 1986 | |
| 24 | Mack Morris | .5166 | 1961 | |
| 25 | Sean Eichele | .5160 | 1956 | |
| 26 | Kent Rodríguez Jr.# | .5146 | 1978 | |
| 27 | Fabroni Aguzzi | .5142 | 1954 | |
| 27 | Sterling Sverdloff | .5142 | 1952 | |
| 29 | Juan Alemán# | .5109 | 1986 | |
| 30 | Jorge López | .5105 | 1963 | |
| 31 | Xiang-ling Hao# | .5104 | 1986 | |
| 32 | Carlos Amézaga | .5090 | 1988 | |
| 33 | Dermott Whitmore | .5088 | 1914 | |
| 34 | Alberto Cervantes# | .5071 | 1989 | |
| 35 | Carlos Amézaga | .5068 | 1985 | |
| 36 | Dave Jordan# | .5046 | 1986 | |
| 37 | George Goodwin | .5021 | 1977 | |
| 38 | Chris Massey | .5017 | 1953 | |
| 39 | Tomokazu Shiroi | .5000 | 1950 | |
| 39 | Pierre-Yves Martinez# | .5000 | 1985 | |
| 39 | Hadde Ippel | .5000 | 1977 | |
| 39 | Fernando Méndez | .5000 | 1956 | |
| 43 | Mike Rúbio | .4985 | 1954 | |
| 43 | Olivier David | .4985 | 1958 | |
| 45 | José Sandoval | .4983 | 1947 | |
| 46 | Robbie Moore | .4982 | 1939 | |
| 47 | Juan García# | .4979 | 1989 | |
| 48 | Allen Caldwell | .4965 | 1958 | |
| 49 | Denver Hahn | .4964 | 1950 | |
| 50 | Arturo Colón# | .4962 | 1986 | |
| 51 | Cameron Bradnock# | .4955 | 1990 | |
| 52 | Roberto Reynoso# | .4945 | 1984 | |
| 53 | Joaquín Muñíz# | .4938 | 1983 | |
| 54 | Phil Lucas# | .4935 | 1982 | |
| 55 | Danny Lyttle | .4934 | 1946 | |
| 55 | José Hernández | .4934 | 1976 | |
| 57 | Greg Wilcox# | .4933 | 1990 | |
| 57 | Esteban Maldonado# | .4933 | 1990 | |
| 57 | Edgar Varela# | .4933 | 1986 | |
| 60 | Carlos Helásquez | .4924 | 1962 | |
| 61 | Juan Montoya | .4923 | 1954 | |
| 62 | Anastasio Ramírez | .4917 | 1961 | |
| 63 | Phil Carter | .4906 | 1985 | |
| 64 | Greg Pérez | .4900 | 1977 | |
| 65 | Benedicto Castillo | .4897 | 1986 | |
| 66 | António Morales# | .4895 | 1989 | |
| 66 | Tom Holt | .4895 | 1946 | |
| 68 | Pedro Calderón | .4894 | 1954 | |
| 69 | Randy Peterson# | .4892 | 1985 | |
| 69 | John Smith | .4892 | 1912 | |
| 71 | Joseph Nicholson | .4888 | 1951 | |
| 72 | Santiago Vallejo# | .4884 | 1984 | |
| 73 | Dave Ross | .4881 | 1913 | |
| 74 | Luis Quiñonez | .4874 | 1954 | |
| 75 | Armandek Uryniuk | .4867 | 1977 | |
| 76 | Daniel Flores | .4861 | 1982 | |
| 77 | John Miller | .4854 | 1968 | |
| 78 | Jud Warner# | .4853 | 1990 | |
| 79 | Herman Hancock | .4847 | 1952 | |
| 80 | José Hernández# | .4845 | 1976 | |
| 81 | Mark James | .4843 | 1953 | |
| 81 | Santiago Azcarreta# | .4843 | 1979 | |
| 83 | Felipe Durán | .4834 | 1955 | |
| 84 | Esteban Ramos | .4833 | 1945 | |
| 85 | Perry Dean | .4805 | 1954 | |
| 86 | Miguel Longoria | .4799 | 1912 | |
| 87 | Bialy Bartnik | .4798 | 1965 | |
| 87 | Guy Davis | .4798 | 1912 | |
| 89 | José Carrillo# | .4791 | 1982 | |
| 90 | Mike Parkinson | .4790 | 1984 | |
| 91 | Matt Davis | .4787 | 1922 | |
| 92 | Jim Carrier# | .4778 | 1987 | |
| 93 | Dave Jordan# | .4773 | 1987 | |
| 94 | Dan Davis | .4772 | 1911 | |
| 95 | Chuck Bowman | .4762 | 1967 | |
| 96 | Orlando García | .4760 | 1952 | |
| 97 | Manuel Ramírez* | .4758 | 1946 | |
| 98 | Paco Chávez# | .4757 | 1987 | |
| 99 | Francisco López | .4755 | 1962 | |
| 100 | Tony Daniel | .4752 | 1957 |
