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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Shigeaki Otani | 1.043 | 1909-1915 | |
| 2 | Ed Hahn | 1.042 | 1909-1911 | |
| 3 | Junichi Koishizawa | 1.034 | 1909-1915 | |
| 4 | Ryo Hirata | 1.026 | 1909-1915 | |
| 5 | Marco Antonio Betancurt# | 1.024 | 1909-1915 | |
| 5 | Daigo Tamura | 1.024 | 1909-1915 | |
| 5 | Kakuzo Okamoto | 1.024 | 1909-1913 | |
| 8 | Nobuyuki Kashima | 1.022 | 1910-1915 | |
| 9 | Daichi Kimura | 1.019 | 1909-1915 | |
| 9 | Harry Hooper# | 1.019 | 1909-1915 | |
| 11 | Yozo Fujioka | 1.017 | 1909-1915 | |
| 11 | Akinori Yokoi | 1.017 | 1909-1915 | |
| 13 | Pedro Ramírez# | 1.016 | 1912-1915 | |
| 14 | Kazuhito Nii | 1.015 | 1909-1915 | |
| 15 | Owen Wilson# | 1.014 | 1909-1915 | |
| 16 | Red Murray# | 1.012 | 1909-1915 | |
| 17 | Shigekazu Miyazaki | 1.011 | 1909-1915 | |
| 18 | Yuichi Taniguchi | 1.010 | 1909-1915 | |
| 18 | Shuuto Yamane | 1.010 | 1909-1915 | |
| 20 | Kensuke Hamano | 1.009 | 1909-1915 | |
| 21 | Motosugu Ishizuka | 1.008 | 1909-1915 | |
| 22 | Remco Maas# | 1.007 | 1914-1915 | |
| 23 | Daiki Suzuki | 1.005 | 1909-1915 | |
| 24 | Hirose Hatakeyama | 1.001 | 1909-1915 | |
| 24 | Koichi Matsumoto | 1.001 | 1909-1915 | |
| 26 | Art Griggs# | 0.995 | 1909-1915 | |
| 27 | Dacio Téllez# | 0.987 | 1914-1915 | |
| 28 | Gavvy Cravath# | 0.973 | 1909-1915 | |
| 29 | Jesús Vázquez# | 0.969 | 1911-1915 | |
| 30 | Bob Ganley | 0.964 | 1909-1911 | |
| 31 | Abdías Padilla# | 0.953 | 1909-1915 | |
| 32 | Dalmacio Piñón# | 0.925 | 1909-1915 | |
| 33 | Tsutomu Nagai | 0.923 | 1909-1915 |
