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The Brooklyn Dodgers en masse started putting plastic liners into their tradition caps in 1941. Indiviudal players had been doing this though beforehand. Modern-day helmets were not manadated until 1971 and ear flaps not until 1982 or '83.

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โˆ™ 2005-09-07 14:28:02
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Q: When did major league baseball players start wearing batting helmets?
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