Pete Alonso on Mets wearing first-responder hats: 'I'm really, really happy about it' - Newsday
New York Mets Wear NYPD Caps in Tribute to Slain Police Officer
9/11 remembered in emotional scene at Mets-Yankees game
Ribbons on Caps as MLB Teams, Players Remember 9-11 – SportsLogos.Net News
Mets, Yankees and more pay tribute on 9/11 20th anniversary
20th anniversary of terrorist attacks marked by NY teams
MLB rejects Mets' first responder hats - Newsday
Mets, Yankees, MLB to Mark 9/11 20th Anniversary with On-Uniform Tributes – SportsLogos.Net News
Major League Baseball bans New York Mets from wearing FDNY, NYPD hats honoring Sept. 11 heroes
Mets, Yankees, MLB to Mark 9/11 20th Anniversary with On-Uniform Tributes – SportsLogos.Net News