Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Robert Thomas Kaiser (born April 29, 1950 in Cincinnati, Ohio) is a former Major League Baseball pitcher who played for one season. He pitched in five games for the Cleveland Indians during the 1971 Cleveland Indians 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.