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Dallas Cowboys
Tim Heitman-USA TODAY Sports
The Dallas Cowboys already have DeMarco Murray, who looks like a franchise back, but the three-year pro has yet to play a full NFL season injury-free. This past season it was a nagging knee injury that forced Murray to miss time, and if the Cowboys hope to contend for a Super Bowl next season, they must have a No. 1 running back healthy at all times. As long as the price tag isn’t too high, which I doubt it will be, the Cowboys should at least entertain the idea of having a two-back system in 2014.