Mets, Yankess don NYPD, FDNY hats, honor Sept. 11 first responders

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

Mets recognize 9/11 20 years later in pregame ceremony

DeGrom, in NYPD hat, backed by 10-run 4th, Mets rout Jays

Lawmaker rips MLB for refusing to let Mets wear 9/11 tribute hats

EXCLUSIVE: Mets greats David Wright and Edgardo Alfonzo 'remember the sacrifices' of fallen 9/11 firefighters in annual visit – New York Daily News

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

We will always remember. #NeverForget - New York Yankees

Mets-Yankees hold 9/11 ceremony honoring first responders

Yankees, Angels remember Sept. 11 before game

Mike Piazza recalls first Mets game in NYC after 9/11

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

Mike Piazza, Mets honor 9/11 fallen, first responders: 'Part of who we are

Yankees, Mets get green light from MLB to wear first-responder caps on 9/11 anniversary

Former Mets manager Bobby Valentine tweaks Yankees over post-9/11 actions – New York Daily News

MLB commemorates 9/11 anniversary with ballpark ceremonies