Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Charles H. Porter was the owner of the Boston Red Stockings of the National League from 1873 through 1874. In 1873, Porter purchased the club from John Conkey. He sold the Red Stockings to Nicholas Apollonio in 1875. 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.