Ebbets Field is in the spotlight this year because the long-departed home of the Brooklyn Dodgers is in the centennial of its birth. But this is also a significant month for the Polo Grounds, the other New York home for National League baseball that succumbed to the wrecking ball decades ago.

After all, it was on April 9, 1963, that the Polo Grounds hosted the last opening day in its long history.

The Mets — not the Giants, who left for San Francisco after the 1957 season — were the home team that day, 50 years ago. And the Mets were reluctant tenants. They had hoped to move into Shea Stadium at the start of that season, their second in the major leagues, but delays in the construction of Shea forced the team to play an extra year in Upper Manhattan.

By then, the final incarnation of the Polo Grounds, which opened in 1911, was on its last legs. There was limited parking, the locker rooms were cramped and the concession stands outdated. Maintenance and restoration work had all but ceased.