All-American Girls Professional Baseball League rules of play progressively extending the length of the base paths and pitching distance, while decreasing the size of the ball until the final year of play in 1954. For the first five years the circuit used a fastpitch underhand motion, shifted to sidearm in the 1947 season, and overhand pitching began in 1948. All-American Girls Professional Baseball League rules of play The All-American Girls Professional Baseball League was a circuit that began to operate in 1943. Since the only organized ball for women in the United States was softball, the league officials created a hybrid game which included features of both fast-pitch
Sport in the United Kingdom Until 2008, automatic promotion and relegation existed between Super League and the Championship when it was replaced by three-year licences for clubs to play in the former. Promotion and relegation returned to Super League and the Championship in 2015. The main knock-out competition is the Challenge Cup, which also includes clubs from France and Canada, and in the past has also included clubs from Russia. Rugby league is also played as an amateur sport, especially in the heartland areas, where the game is administered by BARLA. Since the rugby union authorities ended the discrimination against playing rugby league amateur numbers