Given a passage and a question, find the answer to the question based on the passage. The answer should consist of only one word that lies in the span of only one of the sentences in the passage.

Paragraph: One of baseball 's first expansion teams , the Mets were founded in 1962 to replace New York 's departed NL teams , the Brooklyn Dodgers and the New York Giants . The Mets ' colors are composed of the Dodgers ' blue and the Giants ' orange , which also form the outer two bands of the New York City flag . During the 1962 and 1963 seasons , the Mets played their home games at the Polo Grounds . From 1964 to 2008 , the Mets ' home ballpark was Shea Stadium . In 2009 , they moved into their current ballpark , Citi Field .
Question: when did the new york mets became a team
1962