The Cardinals running back committee has been one of the most frustrating to monitor in terms of fantasy for the last few years, but this offseason, it seems there is at least a little more clarity. It seems that Rashard Mendenhall, formally of the Steelers, has all but wrapped up the starting job, and I would agree. The problem is that Mendenhall has really failed to impress after a major knee and Achilles injury in 2011. That leaves the door open for Ryan Williams, who has an injury history of his own and two rookies who couldn’t be more different, Stepfan Taylor and Andre Ellington. Taylor was a very effective back in the Stanford system last year, but with the terrible state of the Cardinals offensive line, I would give the edge to Ellington, who could possibly be a much better fit for the deep vertical attack of new offensive coordinator Bruce Arians. With the No. 2 spot up for grabs in Arizona, it is always better to take the high-upside guy, which is Ellington, who could be a home run in fantasy football for 2013.