Mets and Yankees to honor first responders on 20th anniversary of 9/11
Mets have discussed Mike Piazza's 9/11 jersey with auction house but have not made an offer yet – New York Daily News
Lot Detail - 2002 Mike Piazza New York Mets Game-Used Black Alternate Jersey (Great Example)
Mike Piazza's post-9/11 home run remains memorable to New York City 20 years later
Keidel: Eli's Reported Involvement In Memorabilia Scandal Defies All Logic - CBS New York
Mike Piazza, Mets honor 9/11 fallen, first responders: 'Part of who we are
Mike Piazza's post-9/11 home run remains memorable to New York City 20 years later
20 years later, the enduring legacy of the Mike Piazza home run - ESPN
Mike Piazza overwhelmed during Hall visit
Piazza's Post-9/11 Helmet Heads to Auction