"It has been an absolute dream come true for me to coach for 36 years," Nunnely said in a statement released by the Broncos. "I am so thankful for all the opportunities I have been given to have a positive impact on others through the game of football. More than anything, I am proud of the accomplishments of the teams and players I have been so privileged to work with over the years."
"This was not an easy decision, but it was the right one for me and my family," Nunnely said.
The Broncos wrapped up their three-day rookie minicamp on Sunday and will hold their first set of offseason organized team activities on May 21.