I am not at the game tonight to witness the ceremony, but I will be at Citifield tomorrow afternoon. The Mets are extremely selective about retiring numbers as before today Tom Seaver's #41 is the only player's number retired. They also retired #37 for Casey Stengel and #14 for Gil Hodges who were managers. Very recently they moved the numbers from the outfield fence to the top of the stadium where they will be more visible. Perhaps in the future more numbers will be retired.
Below is the speech that Mike Piazza gave tonight.