Throwing a sinker is easier when the pitcher has mastered their grip and arm action. As you throw the sinkers, always throw them as if the arm is coming over the top. As the pitcher, rotate your arm high and bring it down until you release the ball. Also, as the thrower, find a grip that works for you. Choose the grip with which your fingers and hand feel comfortable for a perfect pitch. When releasing the sinker, be careful not to overdo it. It may cause over-rotating your arm and lead to an injury. If you feel any pain after throwing a sinker, take some days off to heal and avoid more injury. However, when you know how to throw the sinkers correctly, you will say goodbye to injuries.