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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Rank | Player | WHIP | YEAR | Open Season Leaderboard |
|---|---|---|---|---|
| 1 | Dan Cooper# | 0.87 | 1960-1960 | |
| 2 | Gordon Kulla# | 0.92 | 1960-1960 | |
| 3 | Larry Black# | 0.99 | 1960-1960 | |
| 4 | Carlos Ayala# | 1.07 | 1960-1961 | |
| 5 | Bill Swain# | 1.13 | 1962-1962 | |
| 5 | Dennis Violette | 1.13 | 1960-1961 | |
| 7 | Don Barber# | 1.15 | 1960-1962 | |
| 8 | Rick Attaway# | 1.20 | 1962-1962 | |
| 9 | Ken Morrison# | 1.22 | 1962-1962 | |
| 10 | Andy Luce# | 1.26 | 1960-1962 | |
| 11 | Single A Placeholder# | 1.29 | 1962-1962 | |
| 11 | Dennis Stuenkel# | 1.29 | 1961-1961 | |
| 13 | Barry Gilmore# | 1.30 | 1961-1962 | |
| 14 | Tony Lewis# | 1.35 | 1961-1961 | |
| 15 | John Muller# | 1.36 | 1961-1961 | |
| 16 | Single A Placeholder# | 1.41 | 1962-1962 |
