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Scuffing a Baseball, or roughing up part of its surface, creates turbulence. Turbulence changes the airflow around the ball, making it curve more dramatically when spin is applied.
A baseball will curve naturally, due to the turbulent effect of the seams along the outside of the ball. Scuffing the ball intensifies this effect, and in the hands of a knowledgeable pitcher can be devastating. This is in part why umpires look for obviously-scuffed balls, and remove them from play.
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it loses enegy the other person who said it was gaining was wrong !!~ :) HOPE I HELPED
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