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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Year | Champion | LgERA | LgAvg | Lg |
|---|---|---|---|---|
| 2018 | Austin Citadelles | 3.58 | .237 | CAA |
| 2019 | Raleigh Catfish | 3.65 | .236 | CAA |
| 2020 | Seattle Airhogs | 3.72 | .240 | CAA |
| 2021 | Jacksonville Hammerheads | 3.59 | .238 | CAA |
| 2022 | Hartford Defenders | 4.01 | .247 | CAA |
| 2023 | Boise Hawks | 4.01 | .248 | CAA |
| 2024 | Harrisburg Senators | 4.76 | .262 | CAA |
| 2025 | Boise Hawks | 4.35 | .252 | CAA |
| 2026 | Hartford Defenders | 4.71 | .265 | CAA |
| 2027 | Hartford Defenders | 4.41 | .259 | CAA |
| 2028 | Chesterfield Queens | 4.79 | .263 | CAA |
| 2029 | Chesterfield Queens | 4.17 | .249 | CAA |
| 2030 | Chesterfield Queens | 3.90 | .243 | CAA |
| 2031 | Grand Rapids Whitecaps | 4.18 | .244 | CAA |
| 2032 | Hartford Defenders | 3.53 | .223 | CAA |
| 2033 | Harrisburg Senators | 3.85 | .232 | CAA |
| 2034 | Baltimore Jaspers | 3.60 | .227 | CAA |
| 2035 | Baltimore Jaspers | 3.41 | .223 | CAA |
| 2036 | Baltimore Jaspers | 3.41 | .226 | CAA |
| 2037 | Galway Gales | 3.25 | .224 | CAA |
| 2038 | Galway Gales | 3.16 | .222 | CAA |
| 2039 | Baltimore Jaspers | 3.29 | .225 | CAA |
| 2040 | Galway Gales | 3.12 | .225 | CAA |
| 2041 | Galway Gales | 3.14 | .227 | CAA |
