set. As with the windup, prior to the time of pitch, the pitcher may step toward and throw or feign a throw to a base, subject to the balk rules, or disengage the rubber by stepping back (toward second base) with their pivot foot. Strengths and weaknesses Both types of pitching position have their strengths and weaknesses. Compared to the set, the windup has a relatively slower execution, and it is therefore better suited for situations in which there are no baserunners or when the lead runner is on third base, because it is difficult to steal home plate. Conversely, a pitch from the set, having a relatively faster execution, is preferred when there are baserunners. Faster execution is important to prevent stolen bases. However, some pitchers, particularly relief pitchers, are more comfortable pitching from the set position and thus use it regardless of the situation. Whether a pitcher starts from the windup or the stretch is all about what feels best for their own personal preference. The reason more than half of pitchers start from the windup position is because that type of motion gets a little bit more of a rhythm going before pitching. Impact Data analysis indicates that pitch velocity is equivalent whether thrown from the windup or the set position. Additionally, common wisdom is that the set is less damaging to the connective tissue of a pitcher's arm, but research in this area has been unable to support this hypothesis. References Baseball rules Baseball pitching