My son actually lost about 6 mph between Freshman and Sophmore years mostly because of a growth spurt I believe that had him tripping over his own feet.[/quote]
Thanks for the reply. How old is your son now & how long did it take him to recover?[/quote]
After his Sophmore year he got back to where he was before + 2 mph, going into his senior year he was on schedule to make some gains and then hurt his elbow…from skiiing of all things, not throwing related. So, he ended his Senior year only 2 mph faster on average than his Freshman year.
He is a Freshman in college now (18 years old) and has picked up a few ticks over the summer. He is sitting about 82 ish now. Better than where he was but certainly not where he wants to be ultimately.
So, some kids throw hard from day one. For some it is a work in progress as with my son. Most, in my opinion, have to work at it and put in the sweat.
Large gains (as shown by Kyle) are possible depending on the work ethic and the kid and making sure they are doing the right training in the right way.
Turn 22 is right about there being an adjustment period when a new workout protocol is started.
It varies where you are to some degree but 78 for a 14 year old is above average in my opinion. He is starting from a very good point. Unless he is totally physically mature and shaving every day (doubtful) he will pick some up (maybe a lot) as he matures and continues to work out. Even if he is physically mature there are gains that can be made with the right training.
Be patient with him, he will get there.