WR Johnson out with hamstring injury

By CHRIS DUNCAN | October 5, 2011 | 2:40 PM EDT

Houston Texans coach Gary Kubiak, left, and trainers check on wide receiver Andre Johnson (80) after he was hurt in the second quarter against the Pittsburgh Steelers in an NFL football game Sunday, Oct. 2, 2011, in Houston. (AP Photo/Dave Einsel)

HOUSTON (AP) — Texans coach Gary Kubiak says All-Pro receiver Andre Johnson will an unspecified amount of time after undergoing a minor procedure to repair a right hamstring injury.

Kubiak would not put a timetable on Johnson's return after Tuesday's procedure.

Johnson went down in the second quarter of Sunday's 17-10 win over Pittsburgh. He rejoined his team on the sideline in the fourth quarter, without crutches.

The Texans (3-1) play Oakland (2-2) on Sunday. The 6-foot-3, 226-pound Johnson missed three games last year with a sprained right ankle, including a 31-24 win over the Raiders.

The five-time Pro Bowl selection sat out seven games in 2007 with a left knee injury that required offseason surgery. The Texans went 2-5 without him that year.