ALAMEDA, Calif. - Oakland Raiders defensive end Khalil Mack practiced fully Friday for the first time this week and is expected to play in Sunday's game at Pittsburgh.

Mack has been nursing a sore hamstring that sidelined him for one practice and limited him in another. He originally suffered the injury in the second half of Oakland's 34-20 win over the New York Jets last week.

Raiders coach Jack Del Rio said the move to rest Mack this week was precautionary.

Mack leads the Raiders with four sacks. The 24-year-old pass rush specialist is also one of the Raiders' best run defenders and a prime reason the team owns the second-ranked run defence heading into Sunday.