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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Larry LeJeune | 1.255 | 1970-1975 | |
| 2 | Bobby Day | 1.374 | 1973-1976 | |
| 3 | Trevor Bailey | 1.418 | 1977-1983 | |
| 4 | Joseph Rogers | 1.450 | 1982-1988 | |
| 5 | Matt Johnson | 1.537 | 1973-1979 | |
| 6 | Jesús Rodríguez | 1.583 | 1985-1991 | |
| 7 | Reginald Neal | 1.605 | 1975-1980 |
