Second-year man Jordan James was the first running back to get hit with the bug when he fractured a rib, courtesy of linebacker Fred Warner. Herbert has received just 52 carries over the past two seasons and represents the leftovers of what was a respectable offseason for free agent running backs. 49ers clearly haven't learned from previous mistakesEven before James' injury, the 49ers' backfield depth chart looked about as deep as a kiddie pool. Paralyzed by the absence of their star back, the 49ers finished 6-11, their only losing season since the Pro-Bowler's arrival. With injuries mounting, fans can only pray their star running back doesn't go down, or he may bring the season along with him.