I want to thank those who have tried to “soften” my message. And I am happy to see those who did chime in do have an appreciation for what I’m trying to say or convey.
Over the years I’ve seen hundreds may be at thousands of parents and players who profess that they want to improve their abilities to throw the baseball or their sons abilities to throw the baseball. The number one obstacle to achieving this is their preconceptions as to what is good or bad.
What you describe your has nothing to do with style.
mcloven was quite correct in his assessment.
Each delivery is a complete movement “system”.
All parts of the body a working harmoniously together. There are infinite number ways for this to happen. But far fewer ways that achieve optimum performance. To the “uneducated eye” Wagner’s movement system isn’t going to look like Cueto’s movement system but if you can “see” the fundamentals i.e. momentum transfer is very little difference between them.
It’s interesting that you say you don’t like Stroman.
He would be one of the players that your son should be emulating. Very clean mechanics. Not sure what you have against upright?
Your son is rushing because his upper body moves way past the point that it should before he releases the baseball. And therefore he must continue going toward home plate otherwise his arm would never get to where it needs to be to release the baseball and have a chance of getting a home plate with any kind of accuracy. This is what I call rushing.
He also has less than optimal segmentation i.e. the sequence of hip to upper torso sequencing.
As pointed out by others this could very well be exaggerated because of the mound that his pitching off of. The best video is game video i.e. how the player throws under game conditions…
I will repeat again that so many of you come here professing to want to get better (discover the “truth” of throwing a baseball effectively) but will never do so because of your preconceived perceptions of what constitutes good and bad.