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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | EFF | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Ron Thomas | 1.030 | 2023-2025 | |
| 2 | Juan Ibarra# | .890 | 2033-2036 | |
| 3 | Gerold Olthof# | .881 | 2033-2035 | |
| 4 | Frank de Blooys# | .844 | 2029-2034 | |
| 5 | Jeff Oglethorpe# | .665 | 2031-2033 |
