I found this article online of what the average pitcher throws by age. Do you all agree? Why is there no significant jump between 14/15? Thoughts?
I understand why the guy tallied up the numbers, because almost everyone wants to know how they compare to their peers, but does it really matter? What would a person do with this information, quit pitching? Until you enter into the recruiting process, I don't see how it matters for the average kid. I do have a problem with his "Your goal should be" numbers. Generalizing a max velo based on age when younger than maybe 16 doesn't make sense to me... too many variables.
As far as the 14/15 years, my guess is that he doesn't have enough samples to make that statistically significant (could not find his raw data). Most kids are going to gain a few mph most years (but not all) as they develop physically. Note the max for 16 to 18 jumps 12 mph, but I doubt that many kids do that either.