New York Mets Cy Young winners
4 players
4 players won the Cy Young in a season with the New York Mets. Tom Seaver did it the most, 3 times (1969, 1973, 1975). On a roster now: Jacob deGrom.
A winner counts for a club when he played for it in the season he won, the Immaculate Grid's rule. Award lists from Wikipedia. Every season since 1876 is on file. A season split between two clubs is filed as one combined line and counts for neither.