Dan Reeves, whose career in the NFL spanned nearly four decades, first as a player and then as a coach, died Saturday morning.
Reeves, who played for and won a Super Bowl with the Dallas Cowboys and later led two teams to the championship game as a head coach, was 77.
Reeves' family confirmed his death to the NFL Network's Mike Garafolo, saying he passed away after complications from a long illness.
"His legacy will continue through his many friends, players and fans as well as the rest of the NFL community," the statement said. "Arrangements are still to be determined."
Reeves coached the Denver Broncos to the Super Bowl three times. He also coached the Atlanta Falcons, leading them to a Super Bowl, and the New York Giants.