Brad
You have room to get stronger but be very selective in strength conditioning program.
If you will allow me, I would like to share from my own personal experience and what worked for me as a college/athlete and minor league player.
Before you begin, let me suggest "no heavy lifting" and a lot of rubber tubing and 1-2 pound weight for use to build rotator cuff housing muscles. Abduction, adduction, inversion, eversion, pronate, supranate...in other words, north/south/east/west, think of all these directional movements when composing individualized training program. This is vital in protecting shoulder and arm from injury and must be done prior to increasing weight amounts.
Let me say it this way, find and develop a program that will strengthen your body from the inside-out. What I mean by that is train fine motor skill muscles first in order to establish strong housing and foundation for the larger muscle groups. Specifically, the rotator cuff muscles around ball and socket joint of shoulder.
As in pitching, the lower body and abs play a much larger role than most HS players realize. Build up legs, preferably using running drills such as hill climbing, tire pulls, running with weight attachments, etc. You can be creative but make sure linear movement is involved in lower body building.
Would also increase ab workouts but be careful with lower back and ck with coach about recommended crunch programs. The center muscle groups compliment lower body conditioning and will help attain rotational power and linear movement.
strength conditioning program should, in combination with these recommended components, increase velocity over a period of time, but won't happen over-night and will require much sacrifice and determination along with an All-American diet. Recommend vast amounts of collard greens and chicken every day-lol. All this I just shared, worked for the Shep-LOL But you got to work your program and totally focus with no side attractions, know what I mean
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Wish you the best of luck and hope these suggestions will put you on the road to great success.
Sincerely,
Gotta See Em Shep! (old board username-lol)