The Denver Broncos are looking for a new head coach after Gary Kubiak confirmed reports that he is retiring.
Kubiak's future had come into question before the final set of regular season games on Sunday and he revealed his decision on Monday after finishing his career with a 24-6 win over the Oakland Raiders.
The Broncos won Super Bowl 50 at the end of Kubiak's first season in charge and although they finished this season 9-7 that was not enough to make the play-offs.
Kubiak spent time away from the Broncos earlier in the year after suffering what were described as "complex migraine conditions" but returned to finish the season.
He played quarterback for the Broncos for eight years from 1983 to 1991 and returned to the team in 1995 as quarterbacks coach and offensive co-ordinator, staying until the end of 2005 when he moved to the Houston Texans as head coach.
"As I told our team last night, this is an extremely difficult decision to step down as head coach. I love to work and I love football, but ultimately the demands of the job are no longer a good fit for me," Kubiak said.
"I gave everything I had to this team the last two seasons, but this year, in particular, has been tough on me. As hard as it is to leave this position, I know that it's the best thing for myself, my family and the Denver Broncos.
"Although we fell short of our goals this year, I'm proud of our teams these past two seasons. Helping to bring Mr. Bowlen, his family and this organisation its third Super Bowl is something that will always be very special to me.
"I'm not sure what my future holds, but I know that I'll always consider myself a Bronco. This team is in good hands with a lot of outstanding people, and I expect great things ahead for the Denver Broncos."