NWSB Writer Brett Bivens gives an update on the undrafted free agent rookies acquired by the Seattle Seahawks. These 6 guys are players who are looking to either impress the Seahawks enough to keep them or put enough solid performance on tape that some other team will be interested in giving them a chance. Today Brett looks at Cordarro Law, Kyle Knox, Lavasier Tuinei, Rishaw Johnson and Sean McGrath.