Denver Broncos coach Gary Kubiak stepped down from his dream job on Monday because of health concerns, saying "the demands of the job are no longer a good fit for me."
Kubiak missed a week of work in October after suffering a complex migraine, his second health scare in three years.
Kubiak went 24-11, including a victory in Super Bowl 50, but a 9-7 finish this season kept the Broncos out of the playoffs.
General manager John Elway said he was saddened and disappointed in Kubiak's resignation, "but I understand and respect Gary for doing what's right for him and his family."
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Elway now embarks on his third head coaching search in his six seasons as Broncos GM.