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You Are Here > Baseball-Reference.com > Minor Leagues > Players > John O'Brien Minor League Statistics & History
Teams Played For
Glossaries · Click headers to sort · · CSV · PRE · LINKAbout the Minor League Data
Performance data on minor and international leagues is licensed from and provided by the SABR Minor Leagues Database, a community project sponsored by the Minor League Committee of the Society for American Baseball Research.
The database is under active development. Many statistics are incomplete due to ongoing research and/or limitations in published sources. To learn more about these limitations, or to find out how to contribute, visit the homepage of the SABR Minor Leagues Database.
