Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. William Riddle Marshall (September 22, 1875 in Butler, Pennsylvania - December 11, 1959 in Clinton, Illinois), is a former professional baseball player who played catcher from 1904-1909. He attended college at Grove City College, Slippery Rock University of Pennsylvania and the University of Pennsylvania. 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.