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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Karl Gallizio# | .5978 | 1952 | |
| 2 | David Morrison# | .5435 | 1954 | |
| 3 | Yukio Kotani# | .5333 | 1953 | |
| 4 | Karl Gallizio# | .5269 | 1953 | |
| 5 | Jon Olson# | .5185 | 1952 | |
| 6 | Jamie McIntyre# | .5122 | 1954 | |
| 7 | Noah McMillan# | .5000 | 1952 | |
| 8 | Valentin Covi# | .4948 | 1954 | |
| 9 | Valentin Covi# | .4946 | 1955 | |
| 10 | Yukio Kotani# | .4902 | 1954 | |
| 11 | Miguel Medellin | .4848 | 1953 | |
| 12 | Miguel Medellin | .4757 | 1954 | |
| 13 | Yukio Kotani# | .4731 | 1952 | |
| 14 | You-yi Zhào# | .4730 | 1953 | |
| 15 | Miguel Medellin | .4719 | 1952 | |
| 16 | Noah McMillan# | .4494 | 1953 | |
| 17 | Tae-geun Kang# | .4419 | 1955 | |
| 18 | Jamie McIntyre# | .4342 | 1953 | |
| 19 | Jamie McIntyre# | .4175 | 1955 | |
| 20 | Alain Viard# | .3596 | 1953 | |
| 21 | Serge Migin# | .3579 | 1954 | |
| 22 | Jesus Gelacio# | .3415 | 1955 | |
| 23 | Quentin Baker# | .3333 | 1954 | |
| 23 | Yukio Kotani# | .3333 | 1955 | |
| 25 | Stephen Yeo# | .3261 | 1954 | |
| 26 | You-yi Zhào# | .3200 | 1952 | |
| 27 | Jayden Lindsey# | .3117 | 1955 | |
| 28 | Romain Larue# | .3103 | 1955 | |
| 29 | Jerry Maher# | .3093 | 1952 | |
| 30 | Alain Viard# | .2791 | 1955 | |
| 31 | Alain Viard# | .2759 | 1952 | |
| 32 | Tae-geun Kang# | .2472 | 1954 |
