Here's the overhand throw results from the 2011 NFCA Las Vegas Recruiting Camp. Results are based on a total of 487 participants. Partcipants were HS age and consist of catchers, infielders, and outfielders. Each participant made two clocked throws so the results below are based on a total of 974 throws. I picked this camp because it had full results (most results are pitcher and catcher only), it is on the west coast, and it had the most participants. A quick study of an NFCA camp in NY produced similar results but only had 78 participants. A Blu-Chip College Recruitment Camp in Missouri produced lower results by 1-2 mph on average.
These numbers are from young ladies looking to be recruited....not your typical HS age player. The majority of the numbers from the recuitment camp are on the low end of LK's range.
Average clocked speed: 53.84 mph
Median clocked speed: 54 mph
Highest clocked speed: 67 mph
Lowest clocked speed: 39 mph
Top third average: 58.50 mph (56mph - 67mph)
Middle third average: 53.70 mph (52mph - 56mph)
Bottom third average: 49.31 mph (39mph - 52mph)
Middle half average: 53.77 mph (51mph - 57mph)
Median half average: 54mph
Top 10% average 61.31 mph (59mph - 67mph)
Top 10% median 61 mph
Data came from this link:
http://www.lvtourneys.com/NFCA/index.php
Len