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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Year | Champion | LgERA | LgAvg | Lg |
|---|---|---|---|---|
| 2019 | St. Louis Wolf Pack | 2.97 | .236 | CR |
| 2020 | Lawrenceville 76ers | 3.14 | .245 | CR |
| 2021 | Corpus Christi Beach Boys | 3.07 | .241 | CR |
| 2022 | Vermont Expos | 3.23 | .250 | CR |
| 2023 | Collingwood Magpies | 3.75 | .261 | CR |
| 2024 | Collingwood Magpies | 3.52 | .257 | CR |
| 2025 | Long Island Ducks | 3.61 | .259 | CR |
| 2026 | Kalamazoo Kings | 3.60 | .257 | CR |
| 2027 | Stockton Ports | 3.95 | .260 | CR |
| 2028 | Drew Blue Falcons | 3.94 | .255 | CR |
| 2029 | Drew Blue Falcons | 4.09 | .257 | CR |
| 2030 | Vermont Expos | 4.34 | .268 | CR |
| 2031 | Euharlee Hammerheads | 4.10 | .261 | CR |
| 2032 | Buffalo Red Sox | 3.95 | .251 | CR |
| 2033 | Melbourne Aces | 4.17 | .257 | CR |
| 2034 | Rhome Rhavioli | 4.45 | .262 | CR |
| 2035 | Oklahoma City Hooks | 4.23 | .260 | CR |
| 2036 | Corpus Christi Beach Boys | 3.91 | .238 | CR |
| 2037 | Cork Claws | 3.89 | .239 | CR |
| 2038 | Cork Claws | 3.93 | .240 | CR |
| 2039 | Cork Claws | 4.16 | .245 | CR |
| 2040 | Cork Claws | 4.12 | .245 | CR |
| 2041 | Cork Claws | 3.86 | .238 | CR |
