The New York Mets have retired three numbers in their history. Managers Gil Hodges (14) and Casey Stengel (37), and pitcher Tom Seaver (41) will not have their numbers worn again. Jackie Robinson's 42 has been retired by Major League Baseball.
Presumably nobody with the name Shea shall be allowed in the stadium anymore either, after their former stadium merited a "retired number" as well.
I had a conversation with a good friend earlier today where he lamented that the Mets sweep their history under the rug. He was making a case for a handful of former players that might have been worthy enough to have their numbers retired.
The following should present the case for and against a number of former Mets for getting their numbers retired, in numerical order.