Chris Johnson is considered by many to have been the best running back in the NFL since 2008. The Tennessee Titans, however, might have different feelings since signing Shonn Greene to a three-year, $10 million contract to be a “backup” running back. Johnson exploded on the scene in 2008, sharing carries with former USC running back LenDale White. This duo earned the nickname “Smash and Dash.” White was the bigger back, running through defenders and Johnson was the speedster getting to the outside and racing to the endzone. Johnson rushed for 1,228 yards on 251 carries that year. The next year in 2009,...