After the Second World War came a period of transition for baseball. The majors opened up to ethnic minorities, big name teams the Dodgers and the Giants moved to the west coast from their New York roots, and the leagues eventually expanded to four divisions of six teams each.

二次世界大战后棒球面临转型期。大联盟取消了种族政策，知名球队如道奇和巨人告别发源地纽约，大举迁至西岸，两联盟后来也扩张成四个分区，各六支球队。（现为六 个分区共三十支球队。）

(短文节选,本篇始于：美国大联盟 )