Anthony Kay is joining scary ex-Mets prospect trend

Anthony Kay is inching closer toward membership in the ever-growing club of former Mets prospects who might one day come back to haunt the organization.

The MLB trade deadline was just three days away when the left-handed pitcher learned on Twitter he and fellow hurler Simeon Woods Richardson were being sent from the suddenly surging Mets to the Blue Jays for veteran starter Marcus Stroman.

Stroman has helped the Mets remain in contention, two games out of the second NL wild-card spot.

Meanwhile Kay, like Jarred Kelenic and Justin Dunn — the pair of talented prospects traded last winter to the Mariners for the so-far disappointing Edwin Diaz and Robinson Cano — is impressing with his new…