The New York Giants were a Major League Baseball team in the National League that began play in the 1883 season as the New York Gothams and became known as the Giants in 1885. They continued as the New York Giants until the team moved to San Francisco, California after the 1957 season, where the team continues its history as the San Francisco Giants. The team moved west at the same time as its longtime rival, the Brooklyn Dodgers, also in the National League, moved to Los Angeles in southern California as the Los Angeles Dodgers, continuing the National League, same-state rivalry.

Major League Baseball (MLB) is a professional baseball league and the highest level of organized baseball in the United States and Canada. One of the big four major leagues, MLB comprises 30 teams, divided equally between the National League (NL) and the American League (AL), with 29 in the United States and 1 in Canada. Formed in 1876 and 1901, respectively, the NL and AL cemented their cooperation with the National Agreement in 1903, making MLB the oldest major professional sports league in the world. They remained legally separate entities until 2000, when they merged into a single organization led by the Commissioner of Baseball. MLB is headquartered in Midtown Manhattan.