NFL Hall of Famer Earl Campbell says he is undergoing nerve treatment after doctors ruled out concerns that he might have Lou Gehrig's disease.
The 57-year-old former Heisman Trophy winner said Tuesday that he will be hospitalized in Houston through the weekend.
He compared the effects of the nerve problem to a robot that moves its right leg when instructed to move its left.
Campbell was among the NFL's great power backs, barreling over tacklers and never shying from contact in eight seasons. But his punishing running style cut short his career and left with him with a litany of chronic health problems.
Campbell underwent knee replacement surgery last year and still requires a walker to move around.