San Diego Chargers' Ryan Mathews, right, is tackled by Chicago Bears' Major Wright during the first half of an NFL preseason football game Saturday, Aug. 14, 2010, in San Diego. (AP Photo/Denis Poroy)

Photo by: Denis Poroy

San Diego Chargers' Ryan Mathews, right, is tackled by Chicago Bears' Major Wright during the first half of an NFL preseason football game Saturday, Aug. 14, 2010, in San Diego. (AP Photo/Denis Poroy)