It's basically all about coach Mike Shanahan. (Yep, I'm going to blame the coach.) I'd recount the myriad times Shanahan changed his mind about his prime running back in the past -- can anyone say Reuben Droughns? -- but what would be the point in reliving that pain? The goal is to avoid it again, and even if Helu is the next Arian Foster, well, I'll believe it when I see it, because the coach has proved that anything goes with his depth chart.
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