With the NFL draft over it is time to give you our updated dynasty running back rookie rankings. For these rankings we break down the tiers and tell you where these players should fall in superflex drafts. This draft class is extremely top heavy so to me there needs to be an added emphasis on the tiers. For our dynasty rookie rankings keep in mind the distance within the tiers is closer then the distance between the tiers. A tier change indicated a drop off in either safety, upside or both. Let us know what you think about our dynasty running back rookie rankings! Keep an eye out as we break down all our updated dynasty rookie rankings. Check out our quarterback rankings form yesterday!