Nolan RYAN Shares His SECRET to Throwing a Fastball Like a Pro! - YouTube

Where you generate your force is when your foot hits and you drive straight to the target where you're throwing the ball and you get through the ball. Your head and your shoulders, everything is down through the ball. That's where you generate your most force. The longer you stay with the ball, the more force you're going to have behind the ball, so the harder you're going to throw the ball, the better action you're going to have on the ball and the better control you're going to have. You cannot generate force here and cause you to throw harder. It's when your foot hits the ground, that's when it is. And this is an important key for all kids that want to throw as hard as they're capable of throwing for their body. Hard doesn't happen back here. Hard happens after this foot gets down, out in front. If you'll think strongly to long and think hard out here, you'll be a much better fast ball thrower.