Mike Piazza will wear Mets cap into Baseball Hall of Fame - Newsday
Mike Piazza - Wikipedia
Mets retire Willie Mays' No. 24 as Old-Timers' Day returns - CBS New York
Mike Piazza's No. 31 retired by Mets
SNY - During his time as a Met, Mike Piazza established
He Only Played 3 Seasons but the NY Mets Should Retire His Number
Which cap for Mike Piazza on Hall of Fame plaque?
Mike Piazza's Number will be Retired in July - Mets Hot Corner
Keith Hernandez stunned by Mets jersey retirement news