Jerry Seinfeld stopped by the Mets broadcast booth to make fun of Keith Hernandez's mustache

WATCH: Jerry Seinfeld jumps into TV booth to make fun of Keith Hernandez and call Mets game

Mets retire Keith Hernandez's No. 17 in Citi Field ceremony – KXAN Austin

Keith Hernandez puts on a master class performance while reporting the Cardinals starting defense : r/baseball

Mets fan Jerry Seinfeld is back in the booth with Gary, Keith and Ron

To all the Citi field security guards, LET THIS MAN IN! : r/NewYorkMets

There aren't enough mind blown gifs on earth for this Keith Hernandez ' Seinfeld' revelation, This is the Loop

Mets set to give away Gary, Keith and Ron bobbleheads

Former 1B Keith Hernandez cherishes 'a great moment,' as New York Mets retire No. 17 jersey - ESPN

Seinfeld takes turn as member of Mets' booth

Recap: Seinfeld joins Hernandez, Cohen in Mets broadcasting booth - Newsday

Seinfeld' had a backup plan in case Keith Hernandez was bad at playing himself

MORE