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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Steve Frend* | .5112 | 2012 | |
| 2 | Steve Frend* | .4938 | 2013 | |
| 3 | Steve Frend* | .4853 | 2014 | |
| 4 | Tim Maki* | .4649 | 2044 | |
| 5 | Lorenzo Rodríguez* | .4551 | 2012 | |
| 6 | Lorenzo Rodríguez* | .4526 | 2013 | |
| 7 | Steve Frend* | .4512 | 2015 | |
| 8 | Nick Holmes* | .4495 | 2020 | |
| 9 | Steve Frend* | .4468 | 2018 | |
| 10 | Tim Maki* | .4435 | 2046 | |
| 11 | Steve Frend* | .4434 | 2022 | |
| 12 | Lorenzo Rodríguez* | .4422 | 2014 | |
| 13 | Colin St. John | .4419 | 2014 | |
| 14 | Fernando Bautista | .4407 | 2018 | |
| 15 | Seitaro Maruyama | .4402 | 2020 | |
| 16 | Nick Holmes* | .4350 | 2019 | |
| 17 | Kata Nishikawa | .4337 | 2025 | |
| 18 | Joe Leftwich | .4327 | 2015 | |
| 19 | Lorenzo Rodríguez* | .4305 | 2015 | |
| 20 | Chris Collins | .4279 | 2012 | |
| 21 | Tom Lampley | .4264 | 2029 | |
| 22 | Manny de la Cruz* | .4248 | 2040 | |
| 23 | Colin St. John | .4212 | 2012 | |
| 24 | Seitaro Maruyama | .4205 | 2025 | |
| 25 | Tim Maki* | .4194 | 2045 | |
| 26 | Tom Becker* | .4186 | 2012 | |
| 27 | Manny de la Cruz* | .4180 | 2039 | |
| 28 | Joe Leftwich | .4178 | 2014 | |
| 29 | Tom Lampley | .4177 | 2025 | |
| 30 | Larry White | .4158 | 2018 | |
| 31 | Tom Klein | .4151 | 2014 | |
| 32 | Kata Nishikawa | .4149 | 2023 | |
| 33 | Martín Árias* | .4136 | 2043 | |
| 34 | Kata Nishikawa | .4135 | 2021 | |
| 35 | Hui Pan | .4133 | 2026 | |
| 36 | Chandler Lennie* | .4120 | 2038 | |
| 37 | Tom Lampley | .4113 | 2028 | |
| 38 | Bernardo Vélez | .4106 | 2018 | |
| 39 | Manny de la Cruz* | .4103 | 2041 | |
| 40 | Seitaro Maruyama | .4093 | 2019 | |
| 41 | Tom Klein | .4092 | 2015 | |
| 42 | Masaki Baba* | .4084 | 2018 | |
| 42 | Tom Lampley | .4084 | 2032 | |
| 42 | Steve McGowan* | .4084 | 2029 | |
| 42 | Kata Nishikawa | .4084 | 2020 | |
| 46 | Steve McGowan* | .4074 | 2022 | |
| 47 | Cecil Sauls# | .4072 | 2059 | |
| 48 | Tim Maki* | .4070 | 2048 | |
| 49 | Mario Yescas | .4066 | 2038 | |
| 50 | Chris Collins | .4061 | 2013 | |
| 50 | Fernando Bautista | .4061 | 2019 | |
| 52 | Kichisaburo Tanaka* | .4052 | 2035 | |
| 53 | Manny de la Cruz* | .4049 | 2038 | |
| 54 | Miguel Trujillo# | .4041 | 2061 | |
| 55 | Jesús Velásquez | .4040 | 2030 | |
| 56 | Tim Maki* | .4039 | 2049 | |
| 57 | Li-chi Au | .4025 | 2016 | |
| 58 | Leo Sotolongo | .4023 | 2044 | |
| 59 | Chris Barrett | .4022 | 2014 | |
| 60 | Mike Davis | .4020 | 2026 | |
| 61 | Tom Lampley | .4014 | 2024 | |
| 62 | Tim Raines | .4004 | 2023 | |
| 63 | Li-chi Au | .4000 | 2017 | |
| 64 | Eddie Villegas | .3990 | 2035 | |
| 65 | Justin Davis | .3988 | 2019 | |
| 66 | Nick Holmes Jr.# | .3985 | 2060 | |
| 67 | Tim Maki* | .3975 | 2047 | |
| 68 | Kiyonobu Yamasaki* | .3973 | 2037 | |
| 69 | Eric Gerdes# | .3968 | 2054 | |
| 69 | Steve McGowan* | .3968 | 2031 | |
| 71 | Chris Barrett | .3962 | 2015 | |
| 72 | Hui Pan | .3961 | 2025 | |
| 73 | Tom Klein | .3960 | 2013 | |
| 74 | Stephen Jackson | .3953 | 2015 | |
| 75 | Joe Young | .3944 | 2025 | |
| 76 | Tom Lampley | .3943 | 2027 | |
| 77 | Li-chi Au | .3939 | 2027 | |
| 78 | Tom Klein | .3937 | 2012 | |
| 79 | Larry White | .3934 | 2019 | |
| 80 | Pablo Moreno | .3926 | 2040 | |
| 81 | Steve McGowan* | .3914 | 2030 | |
| 82 | Kyle Reader | .3907 | 2018 | |
| 83 | David Lewis | .3906 | 2021 | |
| 83 | Walt Horne | .3906 | 2053 | |
| 85 | Fernando Murillo | .3905 | 2027 | |
| 86 | Pat Bancroft | .3899 | 2022 | |
| 87 | Will McMahon | .3896 | 2020 | |
| 88 | Niles Killebrew | .3895 | 2043 | |
| 89 | Ron Williams | .3894 | 2022 | |
| 90 | Ramon Villanueva# | .3891 | 2059 | |
| 91 | Niles Killebrew | .3890 | 2046 | |
| 91 | Lane Renouf | .3890 | 2035 | |
| 93 | Masaki Baba* | .3889 | 2017 | |
| 94 | Miguel Portugal# | .3888 | 2060 | |
| 95 | Tim Maki* | .3886 | 2050 | |
| 96 | Tom Lampley | .3885 | 2023 | |
| 97 | Joe O'Neal | .3883 | 2016 | |
| 98 | Jorge Hernández | .3880 | 2017 | |
| 99 | Joe Leftwich | .3879 | 2016 | |
| 100 | Kiyonobu Yamasaki* | .3878 | 2034 |
