Cardinals linebacker Walker out with blow to head
Updated: October 4, 2012, 9:30 PM ETAssociated Press
It wasn't immediately clear when Walker, the backup behind Daryl Washington at an inside linebacker spot, was hurt against the Rams on Thursday night. The injury was announced in the second quarter.
Walker has played in all four games as a reserve and on special teams.
Copyright 2012 by The Associated Press
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