9. Zac Stacy, St. Louis Rams
Stacy comes into the 2014 season full of promise. He started his rookie season slowly, but caught fire in the second half after securing the starting role, ending the year with seven TDs and just shy of 1,000 rushing yards. Rookie Tre Mason could chip away at his snaps, which is especially detrimental to Stacy, who is a workhorse with a less-than-glamorous 3.9 YPC average. (Andy Lyons/Getty Photo)
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