Denver Broncos head coach Gary Kubiak is "resting comfortably" in the hospital and is expected to be released this afternoon, the team said Monday morning.
Kubiak went to the hospital in an ambulance approximately 45 minutes after the Broncos lost to the Falcons on Sunday.
The team initially said Kubiak was suffering from "flu-like symptoms." In a release Monday morning, the Broncos said Kubiak was diagnosed with a "complex migraine condition that caused extreme fatigue and body weakness."
Kubiak has had at least one previous health issue during a game. He collapsed during halftime of a 2013 game when he was head coach of the Houston Texans. Doctors diagnosed him with a transient ischemic attack, which is a mini-stroke.
It's unclear if Kubiak will coach Thursday against the San Diego Chargers.