BHD,
He did say 25 breaking balls in a row are bad. I liked his example of the showcase where the catcher had to throw repeatedly (100 times) to second.
If you listen and understand, it's not necessarily just one thing, it's all these things combined at a young age. Being encouraged to throw harder (with gun), year round throwing (thank you travel teams) seasonal overuse (tournaments together in a short period of time) event overuse (CM's example), not warming up especially when it is cold, and using the breaking ball too much. OUCH.
Using coach May's example, put that together with too many breaking balls, trying to throw your hardest, etc. there is a recipe for disaster. How about the youngster that pitches AND catches? Same game?
I went to a tournament this year pre HS, the dads were using the gun on the kids in a GAME. How about just in bullpen? What WAS the POINT?
My son threw hard at an early age, we never gunned him until late sophmore in HS but you knew he was throwing hard. So with that we eliminated the year round, the breaking balls, insisted on rest and pitch counts.
Dr. Andrews is presenting his facts based on findings on what is happening in youth baseball.
That's the point.