Most arm injuries suffere by pitchers in youth baseball are not the result of a single traumatic event.  Instead, injuries are believed to be due to overuse: the cumulative effect  of microscopic trauma from the repetitive act of pitching itself.  Overuse occurs throughout the course of a single game, season, or year in the developing baseball player. Here are some expert tips on reducing the risk of baseball pitching injuries from overuse, poor pitching mechanics, and/or poor conditioning.