Mets to retire Mike Piazza's No. 31 jersey this season – New York Daily News
Keith Hernandez Joins Short List Of New York Mets With Retired Jerseys
Mets to Retire Mike Piazza's Number - WSJ
Mike Piazza - Wikipedia
Mets will retire Mike Piazza's number on July 30 - Amazin' Avenue
Mike Piazza - Wikipedia
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OTD in 2016: Mets Retire Mike Piazza's No. 31 - Metsmerized Online
Mets to retire Mike Piazza's No. 31 jersey this season – New York Daily News
Mike Piazza Was More Than A Big Bat