Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. John Richard Flinn (born September 2, 1954) is a former Major League Baseball pitcher. Flinn pitched in all or part of four seasons between 1978 and 1982. He had two separate stints with the Baltimore Orioles, the first in 1978-1979, and the second in 1982, in between which he pitched for the Milwaukee Brewers in 1980. 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.