What is the name of the Mets' stadium?

The Mets have used three stadiums as their home field-The Polo Grounds from 1962-1964, Shea Stadium from 1964-2008, and Citi Field from 2009-Present. The Polo Grounds, while used as the Mets' home stadium, was not built for the Mets. It was the New York Giant's field which the expansion team Mets used until Shea Stadium was built.