Recent studies prove that throwing a curveball is dangerous for young pitchers, especially for their arms. However, throwing too many sinkers poses a greater danger. It can cause damage to your elbow depending on the way you throw your sinker or the arm slot you choose. To avoid the risk of hurting your arm as a young pitcher, have a good sinker grip. Avoid pitching too many times, and also be careful how to throw a sinker. When the thrower gets how to throw a sinker well, they can start playing without putting their arms at risk even at an early age.