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.

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.

As head coach of the Denver Broncos, Dan Reeves had already lost a couple of Super Bowls by 1989 and was wound pretty tight, anyway. So when the Jerry-and-Jimmy takeover happened and his beloved Tom ...

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.

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.

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) ...

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 ...

“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 ...