AP

Chris Johnson wasn’t able to stay healthy for long in Arizona.

Johnson, the running back signed by the Cardinals last week, did not play in last night’s preseason game against the Chargers even though the Cardinals had initially planned to get him at least a few carries. Afterward, coach Bruce Arians explained that Johnson pulled a hamstring in Thursday’s practice and will be out for a week or two.

If he’s out two weeks, that means he won’t play at all for the Cardinals, and his first live action in their offense wouldn’t come until the regular season.

Johnson has been very healthy in his NFL career: The only game he’s ever missed was a meaningless Week 17 game. The Cardinals will try to get him healthy in time for Week One, when they hope he looks like the Chris Johnson of old.