Why are MLB players wearing No. 42 jerseys today?

MLB to Celebrate Jackie Robinson Day Friday

Why are MLB players wearing No. 42 jerseys today?

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Players wear No. 42 on their jerseys in honor of Jackie Robinson Day during a baseball game between the Philadelphia Phillies and the New York Mets, Monday, April 15, 2019, in Philadelphia. (

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Mo! Mariano Rivera, number 42. A living Legend whether you're a Yankees fan or notSO blessed to have seen him…

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