Eleven months removed from a torn ACL, cornerback Deshawn Shead is back on the Seahawks active roster. Shead was activated Saturday off the team’s physically unable to perform list. He’d been on the PUP list since the start of training camp while recovering from the knee injury sustained in Seattle’s season-ending playoff loss to the Atlanta Falcons last January. After the initial repair in January, Shead had an additional clean up procedure on his knee to address some scar tissue issues before training camp began in July. He has practiced with the team the last three weeks and would have needed to be added to the roster by early next week at the latest.