Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. John Nicodemus Wilson (June 15, 1890 September 23, 1954) was a Major League Baseball pitcher who played for one season. He pitched for the Washington Senators for three games during the 1913 Washington Senators season. 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.