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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Year | Champion | LgERA | LgAvg | Lg |
|---|---|---|---|---|
| 2012 | Arizona (CLE) Indians | 5.70 | .257 | ARL |
| 2013 | Arizona (LA) Dodgers | 5.03 | .243 | ARL |
| 2014 | Peoria (SEA) Mariners | 5.67 | .277 | ARL |
| 2015 | Mesa Cubs | 4.01 | .235 | ARL |
| 2016 | Peoria (SD) Padres | 4.10 | .247 | ARL |
| 2017 | Tempe Angels | 4.55 | .250 | ARL |
| 2018 | Surprise (TEX) Rangers | 5.00 | .265 | ARL |
| 2019 | Mesa (CHC) Cubs | 5.02 | .268 | ARL |
| 2020 | Tempe Angels | 4.69 | .255 | ARL |
| 2021 | Glendale (CHW) White Sox | 5.05 | .270 | ARL |
| 2022 | Tempe Angels | 5.91 | .274 | ARL |
| 2023 | Tempe Angels | 3.88 | .252 | ARL |
| 2024 | Peoria (SEA) Mariners | 3.85 | .259 | ARL |
