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Standout rookie DE Cassius Marsh leaves practice with knee injury
RENTON, Wash. -- The Seahawks were holding their breath, after one of their standout rookies left practice with a knee injury Wednesday. Fourth-round pick Cassius Marsh, a defensive end, is undergoing an MRI on that knee to see the extent of the damage. Coach Pete Carroll did not address the media after practice Wednesday, but he's scheduled to speak after Thursday's final practice before Friday night's home preseason game against the San Diego Chargers.