Mets to wear regular uniform hats for Sept. 11 game
MLB finally gives Mets permission to wear NYPD, FDNY hats on anniversary of 9/11
Mike Piazza, Mets honor 9/11 fallen, first responders: 'Part of who we are
Francisco Lindor #12 - Autographed Game Used First Responder Hat and Game Used White Commemorative Jersey with American Flag Patch - Jersey Worn During Innings 3-9 - Mets vs. Yankees - 9/11/2021
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MLB Network special remembers baseball's NYC return after 9/11
Mets, Yankess don NYPD, FDNY hats, honor Sept. 11 first responders
Mets to wear regular uniform hats for Sept. 11 game
MLB Players to Wear Ribbons on Caps for 9-11 – SportsLogos.Net News
Mike Piazza, Mets honor 9/11 fallen, first responders: 'Part of who we are
Yankees honor 9/11 with hats, 09/11/2020
9/11: Yankees, Mets toe line together as one unified New York - Sports Illustrated
