Title says it all, but some more information about me. I am 16 and in 10th grade. I throw anywhere from 80-83 and am 5’10" and 190 lb. Thanks!
You need to start eating right and lifting hard. You need to train your core i.e. abs. chest, legs along with sluolders back and arms to avoiid muscel imbalance. but if you can only do so much do these. Dead lifts, squats Leg presses, bench presses. stabilty ball exercises. Check out this link for all you need to know . i know it is for bosy building but search around and you will find what you need. There are articles for baseball and plenty on nutrition. www.bodybuilding.com