Proper softball throwing mechanics involve the whole body, not just the throwing arm. Good mechanics start with the correct grip on the ball and conclude with proper follow-through after the ball's release. Consistently sound mechanics are critical to improving throwing accuracy, adding distance, increasing speed, and maintaining arm and shoulder health.
The Two- or Three-Finger Grip
Softballs range from 11 inches to 16 inches in circumference, compared to 9-inch circumference baseballs. So the softball grip is different from the baseball grip. Depending on their hand size, softball players should grip the ball with two or three fingers across the seams. The thumb grips the other side of the ball, positioned underneath the index finger.
Setting the Feet, Starting the Motion
Players should turn sideways, set their feet shoulder-width apart and bend their knees slightly before starting their throwing motion. As they bring their throwing hand back in a circular motion, they must turn the ball so that it faces away from the target. To line up an accurate throw, players should aim the glove hand or the raised elbow at the intended target and avoid dipping their front shoulder.
Completing the Throw
As players begin the throwing motion, they must turn the ball toward the target and lead with their elbow. While bringing their arm through, they should pull back with their glove arm. This adds power to the throw and helps keep the body balanced. It is important to snap down on the throw, as if to wave goodbye to the target. The throwing side shoulder should come through to the point where the glove-side shoulder started. The back leg should come into in line with the front leg. With proper follow-through, players make full use of their body and put more power behind their throws.
Adjusting Throwing Motions According to Positions
Outfielders must make long throws, so they should use a full circular motion to maximize their range. Infielders need to make quicker throws, so they shouldn't bring their throwing hands back as far while starting the motion. Catchers must be even quicker with their catch-and-throw exchange, so their motion should be compact. The same throwing fundamentals are important to each position.
References
- YouTube: Softball Throwing Mechanics -- Grips and Releases
- MonkeySee: Softball Throwing Mechanics -- Gloveside and Lower Body
- Life in the Fastpitch Lane; Using the Glove Arm When Throwing; March 2008
- Life in the Fastpitch Lane; Getting a Better Follow-Through On Throws; March 2007
- Life On The Fastpitch Lane; A Common Throwing Problem, Dipping the Front Shoulder; September 2008
- Life in the Fastpitch Lane; Throwing Problems, Check the Thumb; April 2008



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