13. DeMarco Murray, Dallas Cowboys
When healthy, Murray is a beast, and he seems to keep getting better. In 2013, he rushed for 1,121 yards and nine TDs (both career highs) and averaged 5.2 yards per carry, third best in the league. Murray also caught 53 passes for an additional 350 receiving yards and a touchdown, and overall looked very dangerous. The question is whether he can meet or exceed his career-high of 14 games in a season. (Jeff Gross/Getty Photo)
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