All-American Girls Professional Baseball League plate, closer even than in regulation softball and much closer than the baseball distance of 60 feet, 6 inches. Pitchers threw underhand windmill, like in softball, and the distance between bases was 65 feet, five feet longer than in softball but 25 feet shorter than in baseball. Major similarities between the AAGPBL and baseball included nine player teams and the use of a pitcher's mound (softball pitchers throw from flat ground). By 1948 the ball had shrunk to 10 3/8 inches, overhand pitching was allowed, and the mound was moved back to 50 feet. Over the history of the league,
Little League Baseball play. Tee-ball Minor League and Little League Intermediate Little League Junior League, Senior League, and Big League Bats (all levels) may be made from wood or other materials (such as aluminum) and must be approved for use in Little League Baseball. For the Majors Division and below, the maximum bat length is thirty-three (33) inches (838 mm) and barrel diameter may not exceed . Beginning in 2009 all Little League bats must be labeled with a Bat Performance Factor (BPF) of 1.15 or lower. Bats for the Junior League level may have a maximum length of thirty-four (34) inches (864