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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Year | Champion | LgERA | LgAvg | Lg |
|---|---|---|---|---|
| 2020 | Mancelona Torch | 3.07 | .248 | PA |
| 2021 | Yellowknife Dragonblood | 3.50 | .253 | PA |
| 2022 | Athletic Club KC U-21 | 3.42 | .255 | PA |
| 2023 | Athletic Club KC U-21 | 3.13 | .246 | PA |
| 2024 | South Beach Blaze | 3.25 | .249 | PA |
| 2025 | Columbia River Rats | 3.00 | .239 | PA |
| 2026 | Columbia River Rats | 3.02 | .236 | PA |
| 2027 | South Beach Blaze | 2.90 | .234 | PA |
| 2028 | South Beach Blaze | 2.83 | .234 | PA |
| 2029 | Idaho Falls Chukars | 3.30 | .247 | PA |
