Washington Redskins running back Tim Hightower breaks free from Pittsburgh Steelers linebacker Jason Worilds (97) and Steelers defensive end Brett Keisel during the first half of an NFL preseason football game in Landover, Md., on Friday, Aug. 12, 2011. (AP Photo/Patrick Semansky)

Photo by: Patrick Semansky

Washington Redskins running back Tim Hightower breaks free from Pittsburgh Steelers linebacker Jason Worilds (97) and Steelers defensive end Brett Keisel during the first half of an NFL preseason football game in Landover, Md., on Friday, Aug. 12, 2011. (AP Photo/Patrick Semansky)