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If you've ever wondered about the wear and tear that is part of pitching, try this at home: Drop your arm by your side, then lift it in front of you and spin it around in a windmill motion. In I second, you might be able to complete two revolutions. Now think about this: At a major league pitcher's release point, his arm is moving so fast that it would spin around 20 times in 1 second.
So imagine making 100 or so pitches a game, factor in the unnatural elbow contortions and wrist twisting, and you can begin to see the stress that is placed on a pitcher's arm. Or you can ask one of the many who have experienced the pain, such as Padres closer Trevor Hoffman. He ...