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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Katsuhito Kato# | .6439 | 2031-2034 | |
| 2 | Yo Ito# | .5913 | 2030-2033 | |
| 3 | Kuniyoshi Gato# | .4788 | 2031-2034 | |
| 4 | Yasukazu Toiguchi# | .4709 | 2037-2040 | |
| 5 | Roberto Yánez# | .4662 | 2032-2035 | |
| 6 | Ed Keller# | .4606 | 2037-2040 | |
| 7 | Keishi Yamashita# | .4601 | 2031-2034 | |
| 8 | Anzai Ogawa# | .4534 | 2031-2034 | |
| 9 | Toby Clark# | .3705 | 2035-2038 | |
| 10 | Juichi Ueda# | .3522 | 2035-2038 |
