Dan Reeves, who won 110 regular season games and three AFC championships during his 12 years as the Broncos' coach, has passed away at age 77.

During a 23-year head-coaching career, Reeves went 190-165-2 in the regular season and 20-11 in the playoffs, reaching four Super Bowls. Reeves is ninth-all time in regular season wins and tied with Jeff Fisher for most regular season losses.

Reeves was inducted to the Broncos' Ring of Fame in 2014 and last coached in the NFL in 2003 with Atlanta. He won five AFC West titles with the Broncos. He is second in team history in regular season wins, behind Mike Shanahan (138).

"One of the winningest coaches in NFL history, Coach Reeves set the foundation for the Broncos' decade of dominance in the 1980s and championship tradition for years to come," the Broncos said in a statement. "Reeves coached the Broncos with integrity, character and toughness along with sincere appreciation for his players and coaches. His time with the Broncos was part of a remarkable 39-year career in professional football in which he appeared in the Super Bowl an astonishing nine times as a player or coach."

Reeves was hired by then-owner Edgar Kaiser in March 1981, a month after Kaiser bought the team from Gerald Phipps.

From 1981-92, Reeves had only one losing season with the Broncos — 2-7 in the strike-shortened 1982 season. The Broncos had seven years of at least 10 wins over Reeves' watch and quarterback John Elway arrived in 1983 to lead six trips to the playoffs.

Reeves' Broncos lost the Super Bowl to the New York Giants (1986), Washington (1987) and San Francisco (1989).

At his Ring of Fame induction, Reeves was asked which Broncos team was his best.

"You're always going to hurt somebody's feelings if you pick the wrong one," he said. "The exciting game no question was, 'The Drive,' (in the January 1987 AFC title game). To go to the first Super Bowl is something you never forget."

Owner Pat Bowlen fired Reeves after the 1992 season when the Broncos lost five of their last six games (Elway didn't play in four of the losses) to finish 8-8.

"It's been a great 12 years for me," Reeves said upon his dismissal. "It's kind of a dream come true when you go into coaching. You know what you want to do is have a chance to run an organization and get the job done. I was able to do that and I thank Edgar Kaiser, who hired me first, and Pat for the opportunity he's given me over the last nine years. The only thing that I look back on and hate is that this town deserves a world championship and we couldn't come through."

Ex-Broncos public relations director Jim Saccomano tweeted about Reeves' emotional departure from Denver.

"He stood in my doorway and shed tears when he left here for good," Saccomano said. "Not many cry when they leave a team. Today, I cry for you, Coach."

Reeves was without employment for a month, joining the New York Giants in January 1993 when Tom Coughlin opted to stay at Boston College and Dallas defensive coordinator Dave Wannstedt chose to become Chicago's coach.

Reeves went 31-33 with the Giants (one playoff appearance) in four years before moving to Atlanta for seven years (49-59-1); Atlanta hired him three weeks after the Giants fired him.

The Falcons' first Super Bowl appearance was after the 1998 season and Atlanta lost to the Broncos in Elway's final game.

Before starting his coaching career, Reeves played eight years for Dallas (1965-72), rushing 535 times for 1,990 yards and 25 touchdowns.

Reeves was an assistant for the Cowboys from 1974-80 before the Broncos hired him.

As a player, assistant coach and head coach, Reeves made nine Super Bowls, winning once as a player and assistant coach apiece with Dallas.

This story will be updated.