Houston Texans coach Gary Kubiak was taken to hospital after collapsing at halftime during a home National Football League game against the Indianapolis Colts on Sunday, the team said.
"He is conscious and his family is with him," the Texans said in a statement. There was no word on what caused the 52-year-old Kubiak to collapse as he was leaving the field but Houston defensive coordinator Wade Phillips, who coached the team in the second half, said it had been a "shock to everyone".
"All his vital signs are good, he did not have a heart attack but they're still checking on him," he told reporters. Kubiak was taken from the field on a stretcher and rushed to a Houston hospital.
"He was light-headed and dizzy," Texans general manager Rick Smith told NBC television. "He is stable. For precautionary reasons of course, we wanted to get him to the hospital and get him evaluated.
"Hopefully, Gary will be back with us tomorrow and we'll move forward." Houston led 21-3 at the half, but had just field goal in the second half after Kubiak's collapse as Indianapolis rallied for a 27-24 victory.
The loss was the sixth in a row for the Texans (2-6), who had Super Bowl aspirations before the start of the season. Kubiak was the second NFL head coach to end up in hospital this weekend.
Denver Broncos coach John Fox was taken to a hospital in the Charlotte, North Carolina on Saturday after feeling light-headed while playing golf. After testing and further observation, it was determined Fox should undergo surgery for an aortic heart valve replacement early next week.
"He will take a leave of absence from coaching for at least the next several weeks," the Broncos said in a statement.