Running back class has much to prove
Beyond Spiller there are plenty of questions about 2010 running back class
Clemson's C.J. Spiller is the clear-cut No. 1 running back in this year's class, and while he is not expected to take part in all drills at the combine, we are interested to see how his 40-yard dash times look. Specifically, we'll be looking at Spiller's 10- and 20-yard splits to help confirm that he is the most explosive offensive skill player in this year's draft.
After Spiller, there's a handful of backs, each with something specific to prove.
What questions do the top running backs have to answer? Who is dealing with injury and who has to address concerns about speed? Become an ESPN Insider to find out.
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