The Cardinals official team website reports that the running back battle for the starting job between Rashard Mendenhall, Ryan Williams and rookies Stepfan Taylor and Andre Ellington could be wide open. “You really can’t tell until the lights come on,” coach Bruce Arians said. “... Until you turn the lights on, you really don’t know about them.” Mendenhall had his best years under Arians in Pittsburgh and now that he’s had so much time to recover from his knee issues – plus his one-year-need-to-prove-it contract – he could be primed for a rebound season. Williams seems certain he will be effective this year, after never being certain in his knee early last season before suffering his shoulder problem. If both come through, Taylor and Ellington won’t be needed. Even if they are, they have to show they are ready.
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