NYPD' helmet worn by Mike Piazza after 9/11 now on auction block

Mets' Mike Piazza hit iconic 9/11 home run 15 years ago Wednesday (VIDEO)

Lot Detail - Lot of (5) Mike Piazza Game Used New York Mets Catcher's Gear Including Mask, Helmet, Batting Glove, Wrist Band & Pair of Shinguards (Steiner & JT Sports)

Mike Piazza 'very disappointed' Mets sold post-9/11 HR jersey that is up for auction

Memories of first Mets game after 9/11, Mike Piazza's home run

Ultimate Mets Database - Mets Uniform History

NYPD' helmet worn by Mike Piazza after 9/11 now on auction block - ESPN - Mets Blog- ESPN

Mike Piazza's post-9/11 home run remains memorable to New York City 20 years later

Piazza Disappointed Mets Dold Post-9/11 Home Run Jersey

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

Lot Detail - 2002 Mike Piazza New York Mets Game-Used Black Alternate Jersey (Great Example)