NY Yankees, Mets unite on 20th anniversary of 9/11
9/11 tributes in football, baseball – Orange County Register
Mets and Yankees to honor first responders on 20th anniversary of 9/11
NY Mets To Wear FDNY, NYPD Caps During 9/11 Anniversary Game
MLB finally gives Mets permission to wear NYPD, FDNY hats on anniversary of 9/11
MLB commemorates 9/11 anniversary with ballpark ceremonies - ESPN
Mets Not Allowed to Wear Hats Honoring NYPD, FDNY, But Joe Torre Says Decision Is Not 'A Lack of Respect'
Mets Yankees first responder caps September 11
MLB denied Mets' request for 9/11 hats based on 'uniformity', says Torre : r/baseball
Talkin' Yanks - The Yankees are wearing NYPD and NYFD hats today on the 21st anniversary of 9/11
Mike Piazza, Mets honor 9/11 fallen, first responders: 'Part of who we are