Rookie defensive lineman Malik McDowell won’t play in 2017 after suffering a severe concussion in a July ATV accident, Seahawks head coach Pete Carroll told reporters, including Bob Condotta of the Seattle Times (Twitter link). Carroll indicated in early October that McDowell still had a chance to see the field this season, but the Michigan State product hasn’t made enough progress in his recovery. Seattle could certainly use help along the defensive line, as Cliff Avril is done for the season with a neck injury while while Dion Jordan is also batting health questions.