The Giants-Dodgers feud began in the late 19th century when both clubs were based in New York City, with the Dodgers based in Brooklyn and the Giants playing at the Polo Grounds in upper Manhattan. After the 1957 season, Dodgers owner Walter O'Malley decided to move the team to Los Angeles primarily for financial reasons. Along the way, he managed to convince Giants owner Horace Stoneham (who was considering moving his team to Minnesota) to preserve the rivalry by taking his team to San Francisco as well. New York baseball fans were stunned and heartbroken by the move. Given that the cities of Los Angeles and San Francisco have long been competitors in economic, cultural and political arenas, their new California venues became fertile ground for transplantation of the ancient rivalry.