Baseball Training Arm Strength

Pitches/Excersises for Varsity Baseball? Please Help.?
I’m going to be a Freshman this year and I’ve been pitching and practicing with the Varsity baseball team. I throw 70-80 mile fast ball, and im 15. I can throw a decent Curve and a nasty fork. Any other pitches that you would recommend that I learn before my first varsity game? Also what are some strength training excersises for my arm? I dont, repeat DONT want to ruin it though.
get a thera band and do shoulder exercises with that. Do squats and ab work. Get a change up you can get by in high school with a decent fastball and a change up/
Developing Howitzer Arm Strength – DeLucasTraining.com

