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HOUSTON Houston Texans coach Gary Kubiak is in stable condition after collapsing on the field at Reliant Stadium just before halftime Sunday night.

Witnesses said Kubiak, 52, fell to his knees as the team was heading to the locker room as time expired for the first half of play against the Indianapolis Colts.

Team officials said Kubiak did not have a heart attack, but did not release any more details.

He had an episode; he was light-headed and dizzy, Houston general manager Rick Smith said in an interview on NBC. He was evaluated by a number of specialists ... he is awake and coherent.

According to football announcers, he seemed responsive as medical staff attended to him. He was seen sitting up before he was taken off on a stretcher.

Announcers said he appeared to be in a lot of pain. Kubiak's family was with him as he was taken away in an ambulance.

Defensive coordinator Wade Phillips took over as interim coach for the rest of the Texans game. Phillips has experience as a head coach from his time with the Dallas Cowboys, Atlanta Falcons and Buffalo Bills.

Phillips said that Kubiak was being taken to the hospital as just a precautionary measure.

Offensive coordinator Rick Dennison took over calling plays for the offense.

The Texans led the Colts, 21-3, heading into halftime, but lost 27-24 after the Colts rallied in the second half. Kubiak and the team have come under a lot of scrutiny this season as they have failed to meet fan expectations with a 2-5 record.

Kubiak is the second NFL coach to be hospitalized this weekend.

Denver Broncos John Fox was hospitalized after feeling dizzy while in playing golf in Charlotte, N.C. Fox remains hospitalized as he awaits aortic value replacement surgery.

This is the second time a Houston head coach has collapsed during a game. It also happened to Astros manager Larry Dierker in 1999.

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