The Amateur Softball Association of America (ASA) is a nonprofit organization based out of Oklahoma City, Oklahoma that runs softball competitions throughout the United States. Over 250,000 teams participate in ASA-sponsored games, with over 3 million players of all ages on those teams. The base path distances for ASA contests are based on the age brackets and the leagues in which those players participate.
Youth Slow Pitch
In ASA youth slow pitch, there are 60 feet (18.29 meters) in between the bases in the boys' and girls' 10 years old and under and 12 years old and under divisions. This base distance is raised to 65 feet (19.81 meters) for those 14 years old and under, 16 years old and under and 18 years old and under in both the boys' and girls' leagues.
Youth Fast Pitch
Youth fast-pitch leagues ranging from 10 years old and under to 18 years old and under require base path distances of 60 feet (18.29 meters) for both boys' and girls' leagues.
Another ASA league uses a 16-inch softball. This league is available for adults only and the base path consists of 55 feet (16.76 meters) for women and 60 feet (18.29 meters) for men.
Adult Slow Pitch
This league is available for adult men, women, co-ed play and major play. For men, women and co-eds, the base path is 65 feet (19.81 meters) and for majors, it is 80 feet (24.38 meters).
Adult Fast Pitch
In the ASA adult league, men, women, junior men and junior women all have the same base path distance of 60 feet (18.29 meters).
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