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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Year | Champion | LgERA | LgAvg | Lg |
|---|---|---|---|---|
| 1970 | Dunn Mallards | 4.88 | .265 | SOB |
| 1971 | Dunn Mallards | 4.66 | .261 | SOB |
| 1972 | Beckett Ridge Beef | 4.59 | .255 | SOB |
| 1973 | Carson Steelhawks | 4.87 | .255 | SOB |
| 1974 | Elkton Martians | 4.43 | .247 | SOB |
| 1975 | Mexico City Conquistadors | 4.37 | .240 | SOB |
| 1976 | Nassau Black Sails | 4.71 | .240 | SOB |
| 1977 | Panama City Capitales | 4.07 | .228 | SOB |
| 1978 | Merida Olas | 4.15 | .230 | SOB |
| 1979 | Castries Palmeras | 4.36 | .237 | SOB |
| 1980 | Castries Palmeras | 3.90 | .226 | SOB |
| 1981 | 0.00 | .000 | SOB |
