Relationship between Mets and Mike Piazza 'has cooled some'
Mike Piazza's No. 31 retired by Mets
Mike Piazza will wear Mets cap into Baseball Hall of Fame - Newsday
Mets retire Willie Mays' No. 24 as Old-Timers' Day returns
Mike Piazza emotional as Mets retire No. 31
mets-to-retire-mike-piazzas-number-this-season
Mike Piazza Loves Hard Rock
Mike Piazza frustrated the Mets allowed his September 21, 2001 jersey to be auctioned - NBC Sports
On Mike Piazza & Dodgers retired numbers - True Blue LA
Mets retire Willie Mays' No. 24 as Old-Timers' Day returns
Hall of Famer Mike Piazza has his No. 31 retired by Mets
Mike Piazza will enter Hall of Fame with Mets' cap
Mets Retired Numbers
Mets Retired Numbers
It's great that the Mets are retiring Mike Piazza's number, but Gary Carter and Keith Hernandez deserve same honor – New York Daily News