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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Year | Champion | LgERA | LgAvg | Lg |
|---|---|---|---|---|
| 1970 | Iowa Oaks | 4.14 | .259 | AA |
| 1971 | Evansville Triplets | 4.18 | .262 | AA |
| 1972 | Denver Bears | 4.00 | .250 | AA |
| 1973 | Denver Bears | 4.13 | .251 | AA |
| 1974 | Evansville Triplets | 3.67 | .235 | AA |
| 1975 | Evansville Triplets | 3.74 | .236 | AA |
| 1976 | Indianapolis Indians | 3.70 | .237 | AA |
| 1977 | Tulsa Drillers | 3.78 | .240 | AA |
| 1978 | Indianapolis Indians | 3.90 | .235 | AA |
| 1979 | Evansville Triplets | 3.96 | .237 | AA |
| 1980 | Evansville Triplets | 3.81 | .239 | AA |
| 1981 | Evansville Triplets | 3.43 | .227 | AA |
