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The old school of thought was a power running game would bring you a fantasy championship. Not anymore.
While running back is the most valuable position, it's probably also the most vulnerable. Once you get past the top tier of running backs, they all have issues. Whether it's another play maker in the backfield, injury concerns or a bad offensive line, many things can cripple a running back's fantasy value.
I'm not saying wide receivers or quarterbacks are sure things, but I would rather have my No. 2 or 3 receiver than the No. 10 running back. The top receiver is just a safer bet than the No. 7 running back in my book.
I have actually stuck to this strategy in my two drafts thus far, in one draft taking Roddy White and Calvin Johnson in the first two rounds, and Roddy White and Andre Johnson in the other.
I could have taken Mendenhall in the first two rounds of either of those drafts, but one look at his carry totals (including playoffs) helped me decide against the Steelers' stud, instead opting for receivers, who are a much better bet in my opinion.
If you feel like you need one stud running back, I can certainly understand that, but I would shy away from taking back to back rushers in the first two rounds.