Seattle made the moves Tuesday afternoon. Edwards was waived with an injury distinction, but no specific injury was cited. The Seahawks now have just five healthy wide receivers.
Edwards had just eight catches for 74 yards and one touchdown in 10 games.
Carpenter returned from a serious knee injury last season and started seven games for the Seahawks at left guard. But he left early in Sunday's win over Chicago after experiencing what Pete Carroll called a sharp pain in his surgically repaired knee. Seattle signed offensive lineman Rishaw Johnson from the practice squad.
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