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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Year | Champion | LgERA | LgAvg | Lg |
|---|---|---|---|---|
| 1970 | Hawaii Islanders | 4.06 | .256 | PCL |
| 1971 | Hawaii Islanders | 4.16 | .251 | PCL |
| 1972 | Spokane Indians | 3.99 | .245 | PCL |
| 1973 | Salt Lake City Bees | 4.03 | .247 | PCL |
| 1974 | Portland Beavers | 3.57 | .229 | PCL |
| 1975 | Hawaii Islanders | 3.40 | .228 | PCL |
| 1976 | Tacoma Cubs | 3.48 | .228 | PCL |
| 1977 | Tucson Toros | 3.50 | .228 | PCL |
| 1978 | Spokane Indians | 3.34 | .218 | PCL |
| 1979 | San Jose Missions | 4.10 | .240 | PCL |
| 1980 | San Jose Missions | 3.81 | .233 | PCL |
| 1981 | Portland Beavers | 3.98 | .227 | PCL |
| 1982 | Tacoma Cubs | 3.80 | .221 | PCL |
| 1983 | Tacoma Cubs | 2.80 | .182 | PCL |
| 1984 | Tacoma Cubs | 2.77 | .180 | PCL |
| 1985 | Hawaii Islanders | 4.29 | .233 | PCL |
| 1986 | Phoenix Giants | 4.27 | .235 | PCL |
| 1987 | Tucson Toros | 4.71 | .244 | PCL |
