The Pittsburgh Steelers will be without intimidating linebacker James Harrison for an indefinite period due to an orbital fracture around his right eye socket, the team said.

A four-time Pro Bowl selection, Harrison was injured during the Steelers' 17-10 loss to the Houston Texans on Sunday. There was no timetable for his return.

Needless to say he is going to be out for a number of weeks, Steelers coach Mike Tomlin told the team's website ( I will have more details after he has the surgical procedure tomorrow to get (the fracture) fixed.

Harrison has been an unflinching and often dominant staple of a defense that has helped propel the Steelers to three of the last six Super Bowls.

Pittsburgh did receive some positive news on Tuesday, however, when quarterback Ben Roethlisberger was cleared of having broken bones in his injured left foot.

Roethlisberger, who was also hurt against the Texans, was expected to play Sunday's game against the Tennessee Titans.