Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Glenn Melvin Cox (born February 3, 1932 in Montebello, California) is a former Major League Baseball pitcher. He pitched in parts of four seasons in the majors, from 1955 until 1958, for the Kansas City Athletics. 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.