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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Travis Brown | .6123 | 1950 | |
| 2 | Jorge Maldonado | .6107 | 1950 | |
| 3 | John Hall | .6087 | 1950 | |
| 4 | Lancaster Seams | .5873 | 1953 | |
| 5 | Hadde Ippel | .5870 | 1950 | |
| 6 | Mike Peterson | .5862 | 1950 | |
| 7 | Ryan Etheridge | .5840 | 1926 | |
| 8 | Javier García | .5829 | 1950 | |
| 9 | Brian Ross | .5655 | 1928 | |
| 10 | Sam Morris | .5635 | 1942 | |
| 11 | Steve McLaughlin | .5622 | 1950 | |
| 12 | Joe Morgan | .5506 | 1950 | |
| 13 | Todd Henry | .5443 | 1956 | |
| 14 | Ron Torres | .5414 | 1934 | |
| 15 | Iván Padilla | .5372 | 1947 | |
| 16 | Ed St. John | .5354 | 1940 | |
| 17 | Orlando Castillo | .5344 | 1935 | |
| 18 | Tomás Árias | .5341 | 1945 | |
| 19 | Lorenzo Mercado | .5337 | 1943 | |
| 20 | Pedro Clia | .5333 | 1947 | |
| 21 | Marcos Mendoza | .5310 | 1933 | |
| 22 | Marcos Mendoza | .5294 | 1935 | |
| 23 | Roberto Chávez | .5280 | 1950 | |
| 24 | Alfredo González | .5278 | 1934 | |
| 25 | John Bird | .5270 | 1950 | |
| 26 | Alonso Jefferson | .5263 | 1922 | |
| 27 | Clement Powers | .5256 | 1937 | |
| 28 | John Manning | .5250 | 1950 | |
| 29 | Jesús Muñóz | .5222 | 1933 | |
| 30 | Brian Ross | .5220 | 1927 | |
| 31 | Matt Hill | .5203 | 1925 | |
| 32 | Alfredo Guzmán | .5190 | 1950 | |
| 33 | Michael Underwood | .5177 | 1929 | |
| 34 | Frank Logan | .5153 | 1928 | |
| 35 | Frank Bailey | .5144 | 1945 | |
| 36 | Sotan Wakabayashi | .5142 | 1943 | |
| 37 | Dan Dethridge | .5138 | 1933 | |
| 38 | Keith Finnell | .5135 | 1932 | |
| 39 | Lance Kaiser | .5131 | 1937 | |
| 40 | Riley Wells | .5111 | 1937 | |
| 41 | Tony Richardson | .5105 | 1947 | |
| 42 | Bill Hooper | .5104 | 1925 | |
| 43 | Tony Duckworth | .5103 | 1929 | |
| 44 | Carlos Helásquez | .5076 | 1958 | |
| 45 | Lorenzo Rodríguez | .5057 | 1955 | |
| 46 | Lance Kaiser | .5049 | 1939 | |
| 47 | Alfredo Valdés | .5028 | 1924 | |
| 48 | Pedro Oporta | .5023 | 1940 | |
| 49 | Melvin McKenzie | .5000 | 1926 | |
| 49 | Juan García | .5000 | 1926 | |
| 49 | Virgil Oglethorpe | .5000 | 1926 | |
| 49 | Bryce Turner | .5000 | 1925 | |
| 49 | Broderick Roberson# | .5000 | 1975 | |
| 49 | Arturo Díaz | .5000 | 1922 | |
| 49 | Mike Crum | .5000 | 1954 | |
| 49 | José Carlos Morales | .5000 | 1929 | |
| 49 | Erik Melton | .5000 | 1937 | |
| 49 | Mark Warren | .5000 | 1940 | |
| 59 | Cong Hua | .4976 | 1938 | |
| 60 | Lorenzo Mercado | .4975 | 1944 | |
| 61 | Mauro Donis | .4974 | 1927 | |
| 62 | Ethan Opie | .4973 | 1950 | |
| 63 | Mishe Legostaev | .4952 | 1935 | |
| 64 | Erik Melton | .4951 | 1935 | |
| 65 | Ryan Etheridge | .4950 | 1927 | |
| 66 | Carlos Helásquez | .4947 | 1959 | |
| 67 | Manuel Núñez | .4935 | 1912 | |
| 68 | António Ramos | .4925 | 1945 | |
| 69 | Pedro Oporta | .4924 | 1941 | |
| 70 | Sung-keun Kim | .4921 | 1933 | |
| 71 | Ed St. John | .4913 | 1939 | |
| 71 | Cliff Parker | .4913 | 1936 | |
| 73 | Hadde Ippel | .4900 | 1953 | |
| 74 | Bob Wright | .4895 | 1931 | |
| 75 | Rafael Rodríguez | .4882 | 1937 | |
| 75 | Adrian Watkins | .4882 | 1932 | |
| 77 | Lancaster Seams | .4877 | 1954 | |
| 78 | Félix Chacón | .4863 | 1927 | |
| 79 | Frank Logan | .4856 | 1927 | |
| 79 | Cliff Parker | .4856 | 1934 | |
| 81 | Erik Melton | .4853 | 1938 | |
| 82 | Eduardo Moya | .4848 | 1922 | |
| 83 | Chris Brooks | .4845 | 1934 | |
| 83 | António Ramos | .4845 | 1946 | |
| 85 | Roberto Rodríguez | .4844 | 1968 | |
| 85 | Aurelio Crus | .4844 | 1931 | |
| 87 | Kent Rodríguez | .4837 | 1936 | |
| 88 | Hernando González | .4830 | 1927 | |
| 89 | Ryan Etheridge | .4820 | 1929 | |
| 90 | Josh McGee | .4819 | 1928 | |
| 91 | António Aguilar | .4815 | 1941 | |
| 92 | Cisco González | .4809 | 1962 | |
| 93 | Bryce Turner | .4803 | 1924 | |
| 94 | Sidney Abbott | .4795 | 1958 | |
| 95 | Héctor Alemán | .4789 | 1956 | |
| 96 | Pedro Oporta | .4785 | 1942 | |
| 97 | Pedro Oporta | .4779 | 1939 | |
| 98 | Jesse Ford | .4767 | 1946 | |
| 99 | Raúl Ramírez | .4766 | 1942 | |
| 100 | José Carlos Morales | .4764 | 1928 |
