Texans coach Gary Kubiak says Andre Johnson is nursing an injured right hamstring and the wide receiver's availability for Sunday's game against Oakland is uncertain. Kubiak said that Johnson will "miss some time," though he said that could range from 3-4 days to a "few weeks." "We're still in the evaluation process," the coach said. "We are dealing with a hamstring, we do know that. We are going to get a couple of different opinions here, over the course of the next two days."