First-responder caps pregame, not in-game - ESPN - Mets Blog- ESPN
Mets wear FDNY, NYPD hats, 09/11/2020
The Mets will wear first responder caps on 9/11, but not during
Yankees, Mets Honor New York First Responders Sunday, 21 years
Sports commemorates 9/11
Mets denied right to wear special caps - Deseret News
Mets rout Blue Jays as teams pay tribute in remembrance of 9/11
MLB player donates customized cleats to 9/11 museum
Mets, Braves gather on the field to shake hands just like they did
Mets, Yankees, New York fans commemorate 20th anniversary of 9/11
It's a day to stop and reflect a little bit, and remind ourselves