Weighted softballs can be one of the easiest ways to strengthen your arm. It is perfect for pitching or just throwing. As you train, gradually increase the weight of the ball as you increase the strength in your pitching or throwing arm.
The CannonBall is rapidly becoming the #1 warm up ball around the baseball and softball world because you can throw it with another person or against a brick wall by yourself. The cannon ball is a great way to loosen up and will increase arm strength and accuracy if used properly. When warming up with the CannonBall, you only want to throw it easy about 10 to 15 tosses, and then throw a regular ball easy about 3 to 4 tosses, then gradually pick up the speed another 10 tosses, or until you feel comfortable.
The Schutt weighted ball is a 13-14 oz ball that is 10 7/8" in circumference. This can be used at any level of play. It is designed to help build arm strength adn flexibility as well as to loosen up your arm quickly.