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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | SLG | YEAR | Open Career Leaderboard |
|---|---|---|---|---|
| 1 | Jack Peck# | .3553 | 2020 | |
| 2 | Forrest McCooke# | .3354 | 2020 | |
| 3 | Tony Martínez# | .3277 | 2020 | |
| 4 | Edgar García# | .3275 | 2020 | |
| 5 | Victorino Navarro# | .3077 | 2020 | |
| 6 | José Sosa# | .3046 | 2020 | |
| 7 | Emílio Gonzáles# | .2838 | 2020 | |
| 8 | Dale O'Sullivan# | .2763 | 2020 | |
| 9 | Víctor López# | .2377 | 2020 | |
| 10 | Miguel Angel González# | .2305 | 2020 |
