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| League History Index | Players | Teams | Managers | Leagues | Leaderboards | Awards | Accomplishments |
| League | Level | From-To | Parent League |
|---|---|---|---|
| Major League Baseball | MLB | 1871-2021 | |
| International League | AAA | 2019-2021 | Major League Baseball |
| Pacific Coast League | AAA | 2019-2021 | Major League Baseball |
| Eastern League | AA | 2019-2021 | Major League Baseball |
| Southern League | AA | 2019-2021 | Major League Baseball |
| Texas League | AA | 2019-2021 | Major League Baseball |
| California League | A+ | 2019-2021 | Major League Baseball |
| Carolina League | A+ | 2019-2021 | Major League Baseball |
| Florida State League | A+ | 2019-2021 | Major League Baseball |
| Midwest League | A | 2019-2021 | Major League Baseball |
| South Atlantic League | A | 2019-2021 | Major League Baseball |
| New York-Penn League | A- | 2019-2020 | Major League Baseball |
| Northwest League | A- | 2019-2020 | Major League Baseball |
| Appalachian League | R | 2019-2020 | Major League Baseball |
| Arizona Rookie League | R | 2019-2021 | Major League Baseball |
| Gulf Coast Rookie League | R | 2019-2020 | Major League Baseball |
| Pioneer League | R | 2019-2020 | Major League Baseball |
| Dominican Rookie League | R | 2019-2021 | Major League Baseball |
