Wesley Branch Rickey was an American baseball player and sports executive. Rickey was instrumental in breaking Major League Baseball's color barrier by signing black player Jackie Robinson. He also created the framework for the modern minor league farm system, encouraged the Major Leagues to add new teams through his involvement in the proposed Continental League, and introduced the batting helmet. He was posthumously elected to the Baseball Hall of Fame in 1967.

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.