Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Billy Rolland Cowan (born August 28, 1938, in Calhoun City, Mississippi) is a retired professional baseball player who played eight seasons for the Chicago Cubs, New York Mets, Milwaukee Braves, Philadelphia Phillies, New York Yankees, and California Angels of Major League Baseball. Major League Baseball (MLB) is the highest level of professional baseball in the United States and Canada, consisting of teams that play in the National League and the American League. The two leagues merged in 2000 into a single MLB organization led by the Commissioner of Baseball after 100 years as separate legal entities.