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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Year | Champion | LgERA | LgAvg | Lg |
|---|---|---|---|---|
| 2015 | Nebraska Plainsmen | 3.92 | .260 | 3L |
| 2016 | Columbus Tidal Waves | 3.89 | .254 | 3L |
| 2017 | Toledo Titans | 4.06 | .261 | 3L |
| 2018 | 4.17 | .257 | 3L | |
| 2019 | Richardson City Thundercats | 4.13 | .255 | 3L |
| 2020 | 4.11 | .256 | 3L | |
| 2021 | Houston 1837 Colt .45s | 3.99 | .251 | 3L |
| 2022 | Oakland Oaks | 4.13 | .257 | 3L |
| 2023 | Detroit Renaissance | 4.08 | .253 | 3L |
| 2024 | Wizarding Express | 4.44 | .259 | 3L |
| 2025 | Seattle Aviators | 3.84 | .244 | 3L |
| 2026 | Montana Pandas | 3.99 | .248 | 3L |
| 2027 | Brooklyn Dodgers | 3.89 | .244 | 3L |
