Arnerican Little League 299 Maria Dr, Petaluma, CA94954 A non-profit that organizes local youth baseball and softball leagues, the American Little League was founded by Carl…More Stotz in 1939 with just three teams. Today, there are Little League teams throughout the world. Boys and girls of all ages can participate in Little League, from t-ball to the junior, senior and big league divisions. Petaluma is part of Little League District 35 and is comprised of approximately 300 boys and girls between the ages of 6 and 16. For more information about the local league and enrollment, call the office or visit the website.