hey coach
im a junior in high school and ive been throwing submarine for 3 years now and i have never had any coaching on submarineing for about 2 years. I have alot of success throwing this way and encourage it to anyone. The best thing to do for a side arm or submariner is to not start him at throwing to low at first. start him sidearm and have him when he is ready to move lower to the ground. also if he gets in a slump make sure he isnt rushing his mechanics. in some cases rushing your machenics increases velocity and decreases movement on the ball. thats not what you want a submariner to do. Also video tape hlm if you can and sit down and have him watch what he is doing.
also make sure he is using his back legs to push of the mound and really trying to reach out to the plate. the ball should have lots of natrual movenment on it and he shouldnt be trying for any more movement than what he can handle. my fastball breaks 11-5 slider 3-9 these are the two pitches i would have him work on cause of the difference in movement. After you feel he has done good with those two have him throw in a change up.
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