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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | OBP | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Yukio Kotani# | .3785 | 1954 | |
| 2 | Karl Gallizio# | .3772 | 1952 | |
| 3 | Jamie McIntyre# | .3688 | 1953 | |
| 4 | Valentin Covi# | .3687 | 1953 | |
| 5 | Yukio Kotani# | .3652 | 1952 | |
| 6 | Alfonso Salas# | .3625 | 1954 | |
| 7 | Yukio Kotani# | .3542 | 1955 | |
| 8 | Valentin Covi# | .3504 | 1955 | |
| 9 | Yukio Kotani# | .3440 | 1953 | |
| 10 | Jamie McIntyre# | .3402 | 1954 | |
| 11 | Jayden Lindsey# | .3358 | 1955 | |
| 12 | Alain Viard# | .3261 | 1955 | |
| 13 | You-yi Zhào# | .3213 | 1953 | |
| 14 | Jamie McIntyre# | .3179 | 1955 | |
| 15 | Alain Viard# | .3145 | 1953 | |
| 16 | Romain Larue# | .3132 | 1955 | |
| 17 | Tae-geun Kang# | .3047 | 1955 | |
| 18 | Tae-geun Kang# | .3046 | 1954 | |
| 19 | Alain Viard# | .3017 | 1952 | |
| 20 | Noah McMillan# | .3014 | 1953 | |
| 20 | Armando Llanes# | .3014 | 1953 | |
| 22 | Stephen Yeo# | .3010 | 1952 | |
| 23 | Jesus Gelacio# | .3007 | 1955 | |
| 24 | Valentin Covi# | .2925 | 1954 | |
| 25 | Jerry Maher# | .2872 | 1952 | |
| 26 | David Morrison# | .2857 | 1954 | |
| 27 | You-yi Zhào# | .2768 | 1952 | |
| 28 | Miguel Medellin | .2677 | 1952 | |
| 29 | Alain Viard# | .2633 | 1954 | |
| 30 | Miguel Medellin | .2555 | 1953 |
