Iron & Oil Association
The Iron & Oil Association was a six-team minor league baseball league that operated in 1884. The circuit was based in Ohio and Pennsylvania and lasted most of one season in 1884.
Cities represented/Teams
Major League Baseball alumni
Notes
1 - New Brighton disbanded on August 1 and was replaced by Johnstown
2 - Oil City disbanded on August 4 and the league folded after that
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| Americas | | | Major | |
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| | Defunct Major Leagues | |
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| | Asia | | | China | |
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| Women's: |
- Japan Women's Baseball League
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| | South Korea | |
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| | | | | | Inter-league and Professional National Team Championships | | |
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