Seattle's McCoy goes down with Achilles injury
McCoy was hurt late in the practice. He was face-down on the field for several minutes before limping to a cart.
Seattle coach Pete Carroll said the initial diagnosis is that McCoy's injury is significant and that it's on the opposite leg of a previous torn Achilles that cost him all of last season. McCoy injured the Achilles on his right leg during offseason workouts before the 2013 season.
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