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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Postseason Leaderboard |
|---|---|---|---|---|
| 1 | Alfredo Montalvo | 0.97 | 2030-2037 | |
| 2 | William Gallegos# | 1.20 | 2033-2038 | |
| 3 | Iván Romero# | 1.25 | 2032-2038 | |
| 4 | Rodrigo Álvarez# | 1.40 | 2033-2038 | |
| 5 | Horace Jacobs# | 1.58 | 2028-2037 |
