In town for the 1964 World's Fair, Samuel Beckett, the brilliant Irish novelist, playwright, poet-- winner of the 1969 noble prize in literature-- attended a double header at Shea Stadium. During the course of the twin bill, Beckett consumed an enormous quantity of beer that forced him to chat with Jane Metansi, the young virile woman from Corona who was selling him those suds.      

As the mythical rumor goes, after both games were over, Beckett and Jane snuck into the bullpen and knocked boots till the Sun came home.... Nine months later and five years back to the future, Jane gave birth to Mr. Met!

During the course of his life, Beckett neither denied nor confirmed the siring.
     
On December 22, 1989, Samuel Beckett gave up the ghost.

so yes, Samuel Beckett is a fan of the Mets.