Dallas Cowboys running back DeMarco Murray (29) is defended by St. Louis Rams linebacker James Laurinaitis during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington,... more 

Dallas Cowboys running back DeMarco Murray (29) is defended by St. Louis Rams linebacker James Laurinaitis during the first half of a preseason NFL football game, Saturday, Aug. 25, 2012 in Arlington, Texas. (AP Photo/Brandon Wade) less