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The idea of weighted-ball training for pitchers to throw faster has been around for more than a half-century. There are studies on the process dating to the late 1960s. In recent years, it's taken on a more universally accepted new form with the use of weighted baseballs as part of advanced training methods to generate more athleticism and arm speed from pitchers with the goal of creating more velocity. But it could be coming at a cost, with a number of elbow injuries being suffered by prominent pitchers known for their velocity at the professional level and anecdotal stories of increased arm troubles for youth pitchers trying to emulate the training methods of the pros.
