I sent this video in back in Jan and got some good feedback. This sight & feedback has led me to some other ?'s. Relative to timing & early cock/late cock position.
My son gets his arm behind his back. In some cases its so extreme that his forearm layback is pointed severely towards 1st base as he’s 140 degree elbow angle/transitioning from early to late cock position. If anything I see most pitchers forearms pointed towards third base @ the same point vs his forearm angle.
The other flaw that stands out is his arm position & foot strike. He’s past late cock position & already getting into the acceleration phase at foot plant. Some days better than others, but never have I filmed him where his arm is coming into late cock with a near 90 degree bend (or vertical vs layed off-abducted).
I do know that he aggressively gets his arm moving after breaking his hands. So much that he stiff arms. I believe the early external shoulder rotation & forearm layback is as much inertia & premature timing as it is taking it back too far inside.
I have tried everything to delay his arm swing… talking about relaxing arm, slight flex in elbow, later hand break (with out details), using lower body, shoulder tilt/lead glove action, shown him comparison videos/images etc… This is a kid with pretty solid mechanics who picks up things fast outside of this issue.
He throws strikes (3+ to 1 K/BB ratio in decent travel league), throws hard (59 on a legit juggs gun, flat surface from stretch) etc… but he had discomfort in the front of his shoulder @ times last year. In addition to injury prevention I’m of the school of thought to correct it now if its an issue that will long term develop into a problem.
a) is my analysis of “all arm/premature upper body” & early rotation accurate?
b) is it a fix that is in immediate need?
c) if so, what drills, exercises or “other” would you advise?
Edit: UPDATED VIDEO FROM MOUND 1B & 3B VIEW