The Dallas Cowboys' two biggest areas of concern going into the opener - cornerback and offensive line - just became more of a problem.

Starting cornerback Terence Newman didn't practice Wednesday and
likely won't play Sunday at the New York Jets because of a lingering groin problem, and fellow starting cornerback Mike Jenkins left practice with a knee injury.

Starting right tackle Tyron Smith also left practice with a knee injury.

Smith and Jenkins were having MRIs to determine the severity of their injuries, and are being considered as day-to-day.

Smith was the ninth overall pick in the draft, and is among three unproven players expected to start on the offensive line.