[header] How to throw a baseball harder [title] Throw gently with a partner at the beginning of every session. [step] Throwing gently will warm up your throwing arm, and throwing too fast too quickly greatly increases the risk of injury. Always warm up for 5-10 minutes of light catch, easy throwing and gentle stretching before trying to throw fast or lift weights. 
[substeps] Warming up loosens your muscles, and this flexibility is key to unlocking your most powerful possible throws. [title] Use your full body to get power into your throws.