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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Romain Larue# | .5579 | 1952-1954 | |
| 2 | Jesus Gelacio# | .5052 | 1952-1954 | |
| 3 | Ryusuke Sugihara# | .5030 | 1952-1955 | |
| 4 | Nicholas Littmann# | .4798 | 1953-1954 | |
| 5 | Willie Martinez# | .4751 | 1953-1955 | |
| 6 | Cipriano Furio# | .4476 | 1952-1954 | |
| 7 | Billy Connell# | .4368 | 1952-1955 | |
| 8 | Marc Milliken# | .4310 | 1954-1955 | |
| 9 | Bob Foster# | .4224 | 1953-1955 | |
| 10 | Hector Molina# | .4194 | 1952-1955 | |
| 11 | Nick Garrity# | .3889 | 1952-1954 | |
| 12 | Josh Anderson# | .3202 | 1952-1953 |
