The young pitcher sounds like a teenage girl when it comes to their body weight. "How can I lose weight and throw harder?" "I don't want to strength train with weights because I will get big muscles." It is obvious these young pitchers have an elementary understanding...
You want to start increasing pitching velocity and then start gaining weight. Yes, a study proves a high correlation between body weight and pitching velocity. The study states that larger athletes on average throw harder than smaller athletes. The case study also...