Casey Stengel and Gil Hodges had their numbers retired as Met managers , and Jackie Robinson had his number retired by all teams .
As of 2017 , Seaver and Mike Piazza remain the only Met players to have their uniform numbers retired .
Casey Stengel and Gil Hodges had their numbers retired as Met managers , and Jackie Robinson had Seaver 's number retired by all teams .
As of 2017 , Seaver and Mike Piazza remain the only Met players to have their uniform numbers retired .