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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Jamie McIntyre# | .4667 | 1953 | |
| 2 | Karl Gallizio# | .4567 | 1952 | |
| 3 | Yukio Kotani# | .4212 | 1953 | |
| 4 | Yukio Kotani# | .4085 | 1952 | |
| 5 | Valentin Covi# | .3863 | 1953 | |
| 6 | Noah McMillan# | .3858 | 1953 | |
| 7 | Alain Viard# | .3767 | 1953 | |
| 8 | Armando Llanes# | .3655 | 1953 | |
| 9 | Jerry Maher# | .3333 | 1952 | |
| 10 | Stephen Yeo# | .3308 | 1952 | |
| 11 | Alain Viard# | .3222 | 1952 | |
| 12 | Miguel Medellin# | .3189 | 1952 | |
| 13 | You-yi Zhào# | .3164 | 1953 | |
| 14 | You-yi Zhào# | .2744 | 1952 | |
| 15 | Miguel Medellin# | .2706 | 1953 |
