Miller, who was carted off the field during Saturday's preseason contest against the Cowboys with a left knee injury, is feared to have suffered a torn ACL, NFL Network's Ian Rapoport reports.

The torn ACL diagnosis won't be confirmed until an MRI is complete, but Miller appears to be facing a lengthy recovery timetable. The Texans are thin at running back behind their veteran starter with Duke Johnson, Buddy Howell, Damarea Crockett and Josh Ferguson next in line.

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