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Movement is a function of physics. It can be taught. Some people learn to throw the way you would teach, so you could say they do it naturally.

There is definitely something about being lefty that affects this. I don't know the physics explanation, I just know from years of observation that it's a fact that lefties have an advantage in this area.

But I also think that things like how you're built, the different sizes of guys' hands or the different lengths of their fingers, all factor in to how the ball is released and the "English" you get on it.
BBB08,

Movement in atmosphere comes from presentation of ball axis.
Axis is the tight “circle of friction’ generated by the spin of the ball.
There are two axis points, one leads and one trails. If you release the ball with the axis’s neutral, meaning equally on the sides horizontally, the ball will just go straight with a little lift that is noticeable with more velocity but is still actually dropping. This is the fastest ball you can throw.
Forward Axis can be imparted with finger pressure (traditional teaching) manipulation or wrist flexion. Wrist flexion (Ulnar and Radial) gives you the best command; movement and power by letting both fingers apply power evenly with both fingers together acting as one. Wrist flexion is a Marshall tenet.

Ulnar flexion performed by turning your hand towards the ball arm side at drive and release will give you the movement towards the ball arm side (classic tailing fastball) by moving the inner axis slightly forward causing higher atmospheric pressure on the inside bottom of the ball making it run to the opposite side of the axis and allows you to pronate the drive and release.

Radial flexion performed by turning your hand towards the glove arm side at drive and release will give you movement towards the glove arm side (classic cutter) by moving the outer axis slightly forward causing higher atmospheric pressure on the outside bottom of the ball making it run to the opposite side of the axis and allows you to pronate the drive and release.
Last edited by Yardbird
My son also throws froma low 3/4 slot. His 4 seam fastball has always had a ton of movement on it. Low 3/4 guys don't gain so much with a two seam as the over the top hurlers because they get less spin across the seams. all 3/4 arm pitchers get natural movement- some more than others. Over the top guys have to mess around with finger placement and pressure it being less natural to get the spin right enabling a ball to run or tail.

In my sons case his problem (if there were such a thing) is getting "too much" movement and thus making it hard for him to hit the spots he wants to. The advantage though is that between the curveball, change-up and fastball, his pitches move all over the place from one to the next and makes the hitter worried leading to a weak swing.

Try dropping the arm slot slightly, it only takes a couple of inches downawards to get killer movement
Oh that is funny sissor bill. You are right though, he has had alot of fun. He actually is a 15 year freshman. Plays high school baseball, is left handed, and was gunned today throwing 85-86. He just has so much movement on the ball that I wondered if it was natural or if he did pick up some of the back yard coaching everyone has given.
when I first posted this he had never been gunned so now I don't know if it is the movement or velocity helping him. At the Elite 24 tournament one of the coaches from the Baltimore Buzz stated that he couldn't throw a straight ball if he wanted to so it just made me wonder. The best advice is to throw and have fun....you are right!

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