ENGLEWOOD, CO - MARCH 07: (L-R) Denver Broncos Head Coach Gary Kubiak, quarterback Peyton Manning, Denver Broncos Executive Vice President of Football Operations and General Manager John Elway, and Denver Broncos President & CEO Joe Ellis pose for a picture as Manning announces his retirement from the NFL at the UCHealth Training Center on March 7, 2016 in Englewood, Colorado. Manning, who played for both the Indianapolis Colts and Denver Broncos in a career which spanned 18 years, is the NFL's all-time leader in passing touchdowns (539), passing yards (71,940) and tied for regular season QB wins (186). Manning played his final game last month as the winning quarterback in Super Bowl 50 in which the Broncos defeated the Carolina Panthers, earning Manning his second Super Bowl title. (Photo by Doug Pensinger/Getty Images)

Broncos reportedly feared the worst when Gary Kubiak was rushed to the hospital

Kubiak is expected to be released from the hospital.

Denver Broncos head coach Gary Kubiak was taken to the hospital by ambulance on Sunday after his team's loss to the Atlanta Falcons.

Related: Head coach taken by ambulance to hospital after loss Sunday

According to 9news.com (via Pro Football Talk), the team was concerned that Kubiak might be having a similar issue as he did in 2013, when he suffered a mini-stroke.

Luckily, Kubiak underwent testing, and was diagnosed with a complex migraine, via a team-issued statement:

"Kubiak was diagnosed with a complex migraine condition that caused extreme fatigue and body weakness. He received medication and is feeling much better with an expected release from the hospital this afternoon."

Kubiak is expected to be released from the hospital, but it is not clear whether he will coach on Thursday night against the San Diego Chargers or not: