Bobbi Darretta • Private Pitching Coach on Instagram: "Work on keeping the arm on the powerline, staying loose & posture. Start with a first drill, your push foot is in front and your arm is on the powerline. You have to learn to stay loose in your shoulder and elbow in order to do this drill and have your hand under the ball when in your whip. Then move on to a balanced drill that forces you to keep your posture and stay loose in your upper body or else you will lose balance. Put the two drills