Mets to wear first responder hats in-game on Saturday for anniversary of Sept. 11

Mets, Yankees will remember 9/11 before Saturday game

MLB struck out not allowing hats

Sept. 11 Attack 20th Anniversary: Live Updates: With Bowed Heads, Americans Reflect on 9/11 and Its Aftermath - The New York Times

New York Mets legend, 9/11 first responders team up to rebuild Ala. homes

Mets' Alonso donates customized cleats to 9/11 museum - The San Diego Union-Tribune

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

Mets, Yankees and more pay tribute on 9/11 20th anniversary

20th anniversary of terrorist attacks marked by Yankees, Mets

Mets to wear first responder caps in-game on Friday for anniversary of Sept. 11, Pete Alonso announces

9/11 remembered in emotional scene at Mets-Yankees game

Mets to wear hats honoring 9/11 first responders, Pete Alonso says

Mets Want To Settle Cap Flap, Honor First Responders Next Sept. 11 - CBS New York