Mike Piazza, Mets remember 9/11's aftermath – and 'divine intervention' in sports' return to New York City
Mets, Yankees to wear first responder caps for 9/11 remembrance game vs. Yankees
Mike Piazza, Mets honor 9/11 fallen, first responders: 'Part of who we are
Mets have discussed Mike Piazza's 9/11 jersey with auction house but have not made an offer yet – New York Daily News
Mets and Yankees to honor first responders on 20th anniversary of 9/11
How Sports World, Teams Plan to Honor 20th Anniversary of 9/11 – NBC New York
Piazza's Post-9/11 Helmet Heads to Auction
Mets have discussed Mike Piazza's 9/11 jersey with auction house but have not made an offer yet – New York Daily News
Mets' Mike Piazza hit iconic 9/11 home run 15 years ago Wednesday (VIDEO)
Mike Piazza, Mets honor victims of Sept. 11 attacks