My little brother turns 16 in a month. He's a JV-caliber pitcher for one of the best baseball schools in the state. He's 6'2", 200 pounds, and frankly is a bit out of shape. His natural arm and size has him throwing low-80s mph. He's turned a bit inconsisntent and fatigues easily and I can contribute that to his training and conditioning.
A big emphasis this summer is going to be on his throwing and training for that (throwing far, throwing weighted balls, throwing off the mound), but his overall level of fitness is lacking and is becoming a limiting factor for his pitching. The goal is to throw about 3 times a week, with two days of weight training and two days of conditioning.
What would you recommend as a protocol to follow? The balance and athletic attributes of your program is a perfect fit for him.