The Yankees and Mets are wearing first responders' hats today for the anniversary of 9/11 (via @mets)

Yankees, Mets Honor New York First Responders Sunday, 21 years after 9/11 - Fastball

Bleacher Report on Instagram: The Yankees and Mets are wearing first responders' hats today for the anniversary of 9/11 (via @mets)

Why MLB's refusal to let Mets wear 9/11 first responder hats is wrong, and how situation can be rectified

Mets, Yankees will remember Sept. 11 attacks before Saturday game

Mets, Yankees, MLB to Mark 9/11 20th Anniversary with On-Uniform Tributes – SportsLogos.Net News

MLB finally gives Mets permission to wear NYPD, FDNY hats on anniversary of 9/11

Watch Mets, Yankees pay respects on 9/11 anniversary, crowd erupts into chants of USA

Yankees and Mets Wear NYPD, FDNY Hats and 9/11 Patch to Honor First Responders – NBC New York

Mets, Yankees to wear first responder caps for 9/11 remembrance game vs. Yankees

Mets-Yankees hold 9/11 ceremony honoring first responders

Mets wearing first responder hats for 9/11 game

New York Yankees, Mets Come Together For 9/11 Pre-Game Ceremony – OutKick

Bleacher Report on Instagram: The Yankees and Mets are wearing first responders' hats today for the anniversary of 9/11 (via @mets)

A Detailed Look at the Mets' Black Throwbacks