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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Jon Maas# | .4720 | 1957 | |
| 2 | Wei-hong Shao# | .4632 | 1956 | |
| 3 | Zaccaria Cartellieri# | .4480 | 1955 | |
| 4 | Wei-hong Shao# | .4451 | 1957 | |
| 5 | Wei-hong Shao# | .4393 | 1953 | |
| 6 | Wei-hong Shao# | .4389 | 1958 | |
| 7 | Eric Snow# | .4339 | 1956 | |
| 8 | Jesus Medina# | .4164 | 1953 | |
| 9 | Wei-hong Shao# | .4154 | 1954 | |
| 10 | Eric Snow# | .4048 | 1955 | |
| 11 | Israel Trujillo# | .4022 | 1958 | |
| 12 | Zaccaria Cartellieri# | .3965 | 1956 | |
| 13 | Pavle Uskokovic# | .3918 | 1958 | |
| 14 | Wei-hong Shao# | .3913 | 1952 | |
| 15 | Eric Snow# | .3887 | 1958 | |
| 16 | Wei-hong Shao# | .3864 | 1955 | |
| 17 | Kazu Nakanishi# | .3857 | 1953 | |
| 18 | Zaccaria Cartellieri# | .3852 | 1953 | |
| 19 | Eric Snow# | .3817 | 1957 | |
| 20 | Josh Lewis | .3810 | 1952 | |
| 21 | Owen Bond# | .3767 | 1956 | |
| 22 | Owen Bond# | .3696 | 1955 | |
| 23 | Jesus Medina# | .3690 | 1952 | |
| 24 | Matt Ward | .3655 | 1952 | |
| 25 | Owen Bond# | .3641 | 1958 | |
| 26 | Zaccaria Cartellieri# | .3575 | 1954 | |
| 27 | Owen Bond# | .3539 | 1954 | |
| 28 | Jesus Medina# | .3507 | 1956 | |
| 29 | Jon Maas# | .3504 | 1958 | |
| 29 | Mike O'Shea# | .3504 | 1953 | |
| 31 | Zaccaria Cartellieri# | .3497 | 1958 | |
| 32 | Jesus Medina# | .3483 | 1955 | |
| 33 | Jon Bertelson# | .3431 | 1957 | |
| 34 | Steven Wright# | .3425 | 1957 | |
| 35 | Kazu Nakanishi# | .3361 | 1954 | |
| 36 | Mike O'Shea# | .3342 | 1958 | |
| 37 | Kai Coles# | .3333 | 1955 | |
| 38 | John Morgan | .3324 | 1953 | |
| 39 | Zaccaria Cartellieri# | .3277 | 1952 | |
| 40 | Bill Purkis# | .3276 | 1958 | |
| 41 | Jesus Medina# | .3243 | 1954 | |
| 42 | Daniel Martin# | .3217 | 1954 | |
| 43 | Kai Coles# | .3179 | 1954 | |
| 44 | Daniel Martin# | .3173 | 1955 | |
| 45 | Justin Kipley | .3172 | 1952 | |
| 46 | Zaccaria Cartellieri# | .3138 | 1957 | |
| 47 | Bill Purkis# | .3137 | 1956 | |
| 48 | Kai Coles# | .3127 | 1957 | |
| 49 | Joel Reid# | .3125 | 1958 | |
| 50 | Josh Cutsail# | .3099 | 1957 | |
| 51 | Josh Cutsail# | .3041 | 1952 | |
| 52 | Juan Montemayor# | .3029 | 1958 | |
| 53 | Josh Cutsail# | .2941 | 1955 | |
| 54 | Daniel Martin# | .2928 | 1956 | |
| 55 | Josh Cutsail# | .2819 | 1954 | |
| 56 | Trace Newman# | .2715 | 1953 |
