Dan Reeves, who spent decades in the NFL as a running back and a coach, has died "due to complications from a long illness," according to his family. He was 77.

My heart goes out to Pam and the entire Reeves family." UNSPECIFIED - CIRCA 1987: Head Coach Dan Reeves of the Denver Broncos looks on from the sidelines during an NFL football game circa 1987.

ENGLEWOOD, Colo. -- Dan Reeves, who appeared in nine Super Bowls as a player, assistant coach and head coach, died at his home in Atlanta on Saturday. He was 77. Reeves is one of only 10 coaches ...

Daniel Edward Reeves, who died at 77 last week, wasn’t viewed as anything special when he joined the Cowboys in 1965 as an undrafted rookie free agent out of the University of South Carolina.

Head coach Dan Reeves of the Denver Broncos talks with his quarterback John Elway circa 1988 at Mile High Stadium in Denver, Colorado. Reeves was the head coach of the Denver Broncos from 1981-92.

Atlanta Falcons coach Dan Reeves, center, breaks it down for kicker Morten Andersen (5), and center Dave Widell, right, during one long ago 1998 practice. (AP Photo/Erik S. Lesser) ...

Broncos coach Dan Reeves pauses in what appears to be a moment of prayer as the Denver defense had to hold Atlanta to break up the drive on the Falcon’s last score. The Denver defense did not hold.

ATLANTA (CBSDFW.COM/AP) - The family of former Cowboys running back and NFL head coach Dan Reeves announced on Saturday, Jan 1 that he had passed away at age 77.

“Dan Reeves leaves a lasting legacy in our game as a player and coach," said Falcons owner Arthur Blank, who fired Reeves from his final job in 2003. “His track record of success in Dallas ...

“Dan Reeves leaves a lasting legacy in our game as a player and coach," said Falcons owner Arthur Blank, who fired Reeves from his final job in 2003. “His track record of success in Dallas ...