Legendary former NFL player and head coach Dan Reeves has sadly passed away at the age of 77, as reported by ESPN's Adam Schefter.

This is another sad loss for the NFL world. Dan Reeves had one of the most impressive NFL careers of any coach/player, as he was involved in nine Super Bowls- the third-most of any individual- during his 38 years in the league, which spanned stints as the head coach of the Denver Broncos, New York Giants and Atlanta Falcons.

As an NFL player, Reeves appeared in two Super Bowls with the Dallas Cowboys, winning one. Reeves signed with Dallas as an undrafted free agent, originally as a safety, but legendary Cowboys coach Tom Landry shifted him to running back, where he took off.

As a head coach, Reeves made it to three Super Bowls in 12 seasons with the Broncos, losing all three. He then spent four seasons with the Giants before taking a head coaching position with the Falcons, who he also led to a Super Bowl, the franchise's first. At the time, he was just the third coach to lead multiple teams to a Super Bowl berth.

In a fateful twist, Reeves' Falcons lost that title game to his former team, the Broncos. At the time, he was just the third coach to lead multiple teams to a Super Bowl berth. Reeves was inducted into Denver's Ring of Fame in 2014.

Reeves is one of just ten NFL head coaches to win at least 200 games. Above all his impressive NFL contributions for the Cowboys, Broncos, Giants, and Falcons, Reeves was a family man.

The thoughts and prayers of the NFL world are with Dan Reeves and his family.