DENVER, CO - SEPTEMBER 03: Head coach Bruce Arians of the Arizona Cardinals and head coach Gary Kubiak of the Denver Broncos meet at midfield following their during preseason action at Sports Authority Field at Mile High on September 3, 2015 in Denver, Colorado. The Cardinals defeated the Broncos 22-20. (Photo by Doug Pensinger/Getty Images)

Following earlier hospital visit, an NFL head coach is officially retiring

The strain on the team seriously affected their head coach.

After winning the Super Bowl last year in what can only be described as a dream season, the Denver Broncos had trouble keeping pace in 2016, missing the playoffs with a 9-7 record.

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One year removed from landing at the top of the NFL world, Gary Kubiak retired amid health concerns, saying, "the demands of the job are no longer a good fit for me," per USA Today.

The strain on the team seriously affected head coach Gary Kubiak, causing the head coach to be taken to the hospital with a concern that Kubiak might be having a similar issue as he did in 2013, when he suffered a mini-stroke, according to 9news.com (via Pro Football Talk).

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."

In addition to winning Super Bowl 50 with Denver, 55-year-old Kubiak has won three other Super Bowls in his career as an assistant for the San Francisco 49ers. As a head coach, Kubiak has a 81-75 career record between stints with the Texans and the Broncos.