"It's hard for me to give you an answer right now," Texans coach Gary Kubiak said. "He's going to miss some time. I don't know if that's three or four days. I don't know if that's a few weeks.
"We're dealing with a hamstring, we know that. We're still in an evaluation process. We're going to get a couple different opinions over the course of the next two days. Once we get a better evaluation and see how he progresses over the next two days, I can probably answer your question better."
Johnson is considered unlikely to play Sunday against the Oakland Raiders.
Jacoby Jones would start in his place.
For more coverage of the Texans, go to profootball.scout.com.
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Texans uncertain how long A. Johnson is out
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