Dallas Cowboys Pro Bowl linebacker DeMarcus Ware won’t play in Saturday’s preseason game at San Diego Saturday night after experiencing hamstring soreness.

Ware felt the hamstring stiffness during Thursday’s practice session. The injury isn’t considered serious and Ware was held out of Saturday’s game as a precaution.

Ware is another Cowboy in a long line of players to be sidelined because of hamstring injuries during the team’s three weeks of training camp practices. Starting wide receiver Miles Austin has also been out with a strained hamstring after missing six games last season with pulled hamstrings.

Three offensive players — tight end Jason Witten and offensive linemen Kevin Kowalski and Phil Costa — and three defensive players — linebackers Isaiah Greenhouse, Kyle Wilber and Caleb McSurdy — weren’t at the walkthrough practice Friday morning. All six are out with injuries. Austin isn’t expected to play at San Diego.

Ware’s injury means three outside linebackers will be out for Saturday’s game – Ware, Antony Spencer and rookie Kyle Wilber have all been ruled out.