It's great that the Mets are retiring Mike Piazza's number, but

Piazza has No. 31 retired

Mets to Retire Mike Piazza's Number - WSJ

Mike Piazza to Have Number Retired by the NY Mets

Mets' retired numbers

Why would the Mets wait so long to retire Mike Piazza's No. 31

Where should the Mets place Mike Piazza's retired number? - Amazin

BenFred's 5: Hey STL, Mike Piazza needs dining help

Mets retire Willie Mays' No. 24 as Old-Timers' Day returns

Mets Retire Mike Piazza's Number With Uplifting Ceremony

YOU ARE BIDDING ON A NY METS #31 MIKE PIAZZA SIGN RETIRED NUMBER FROM CITI FIELD SIGN IS 12” ACROSS THIS IS BRAND NEW PLEASE EMAIL ME WITH ANY

NY METS MIKE PIAZZA RETIRED NUMBER SIGN #31 HALL OF FAME HOF MLB BASEBALL

Mike Piazza's 9/11 Mets jersey goes for $365K, will be publicly

Mets preparing to honor Mike Piazza with a Piazza weekend - Amazin

Mike Piazza pays tribute to 'baseball icon' Tom Seaver