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

Lot Detail - Mike Piazza Game Used and Signed New York Mets Batting Helmet

Piazza 9/11 Jersey: The Story From The Original Owner

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)

20 years later, the enduring legacy of the Mike Piazza home run - ESPN

Mets have discussed Mike Piazza's 9/11 jersey with auction house but have not made an offer yet – New York Daily News

Mets admit mistake in selling 9/11 jersey worn by Mike Piazza - ABC7 Chicago

Mike Piazza, Mets honor victims of Sept. 11 attacks

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

Mike Piazza's NYPD helmet from 2001 game heads to auction block

Mets have discussed Mike Piazza's 9/11 jersey with auction house but have not made an offer yet – New York Daily News

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