average speed high school pitcher
14-years old - 50+. Average high school pitcher - 53-57 mph. Again, these are NOT recommendations...just what we have seen from girls of all sizes, in a variety of leagues and competition levels, in various parts of the U.S.(4) Radar guns and other speed measuring devices vary CONSIDERABLY in accuracy.verage high school pitcher - 53-57 mph. Again, these are NOT recommendations...just what we have seen from girls of all sizes, in a variety of leagues and competition levels, in various parts of the U.S.(4) Radar guns and other speed measuring devices vary CONSIDERABLY in accuracy.