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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Year | Champion | LgERA | LgAvg | Lg |
|---|---|---|---|---|
| 2013 | San Diego Sea Turtles | 4.15 | .250 | PL |
| 2014 | Lexington BC | 4.67 | .267 | PL |
| 2015 | Boston Patriots | 4.28 | .255 | PL |
| 2016 | Louisville Slugs | 4.54 | .261 | PL |
| 2017 | Brooklyn Dodgers | 4.06 | .261 | PL |
| 2018 | Brooklyn Dodgers | 3.85 | .253 | PL |
| 2019 | Brooklyn Dodgers | 3.80 | .253 | PL |
| 2020 | Boston Patriots | 3.58 | .247 | PL |
| 2021 | Brooklyn Dodgers | 4.06 | .257 | PL |
| 2022 | Boston Patriots | 3.74 | .248 | PL |
