Bleacher Report on Instagram: The Yankees and Mets are wearing first responders' hats today for the anniversary of 9/11 (via @mets)
Mike Piazza, Mets honor victims of Sept. 11 attacks
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NY Mets to wear first responder caps during a game on 9/11
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Mets to wear first responder caps in-game on Friday for anniversary of Sept. 11, Pete Alonso announces
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Bleacher Report on Instagram: The Yankees and Mets are wearing first responders' hats today for the anniversary of 9/11 (via @mets)