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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| Year | Champion | LgERA | LgAvg | Lg |
|---|---|---|---|---|
| 2015 | Nashville Sounds | 4.48 | .264 | AAA West |
| 2016 | Oklahoma City Dodgers | 4.75 | .280 | AAA West |
| 2017 | Nashville Sounds | 4.75 | .277 | AAA West |
| 2018 | Nashville Sounds | 4.80 | .274 | AAA West |
| 2019 | Omaha Storm Chasers | 4.50 | .273 | AAA West |
| 2020 | Sacramento River Cats | 4.89 | .274 | AAA West |
| 2021 | New Orleans Zephyrs | 4.97 | .279 | AAA West |
| 2022 | Iowa Cubs | 4.86 | .277 | AAA West |
| 2023 | Oklahoma City Dodgers | 4.67 | .261 | AAA West |
| 2024 | El Paso Chihuahuas | 4.83 | .256 | AAA West |
| 2025 | Oklahoma City Dodgers | 4.35 | .255 | AAA West |
| 2026 | Oklahoma City Dodgers | 4.23 | .250 | AAA West |
| 2027 | Tacoma Rainiers | 4.66 | .258 | AAA West |
| 2028 | Oklahoma City Dodgers | 4.39 | .255 | AAA West |
| 2029 | Memphis Redbirds | 4.19 | .256 | AAA West |
| 2030 | Fresno Grizzlies | 5.20 | .262 | AAA West |
| 2031 | Omaha Storm Chasers | 4.41 | .252 | AAA West |
| 2032 | El Paso Chihuahuas | 5.10 | .266 | AAA West |
| 2033 | Las Vegas Aviators | 4.86 | .261 | AAA West |
| 2034 | Tacoma Rainiers | 4.90 | .256 | AAA West |
| 2035 | Salt Lake Bees | 5.30 | .263 | AAA West |
