Houston Texans coach Gary Kubiak was taken to hospital on Sunday after collapsing before half-time in Sunday's 27-24 defeat to Indianapolis Colts.
The 52-year-old was taken to hospital, conscious, after being stretchered off the field by trainers.
Fortunately it was later confirmed that Kubiak had not suffered a heart attack, with the Texans' defensive coordinator Wade Phillips confirming that "his heart rate was fine and that his pulse was fine".
Kubiak's family accompanied him to the hospital, where he is expected to make a full recovery before being discharged - once doctors conduct more tests to find out what caused him to collapse.
He became the second NFL head coach to be hospitalised inside the last week.
Denver Broncos coach John Fox was also taken to hospital after feeling light-headed while playing golf, with the Broncos announcing that he will take a leave of absence for the "next several weeks".