Your problem is that you didn't get three solid RBs. You got one solid RB (Green), and two inconsistent running backs. Davis, while he did put up good number last season, is still a rookie and tends to fumble. Westbrook, while a decent back, plays on a team that is thinking pass first, pass second, and run third. If I were you, once Davis gets healthy, again, look to trade him for a consistent WR.