The Miami Dolphins lost a legend on Saturday night. Mercury Morris, a three-time Pro Bowl running back for the Dolphins in the 1970s, has passed away, according to a post from his family. Morris was 77 years old.

The family’s press release states:

It is with deep sadness that we announce the passing of Eugene “Mercury” Morris, legendary Miami Dolphins running back and cherished member of the NFL family, at the age of 77. Known for his electrifying speed and dynamic play, Mercury was a cornerstone of the Dolphins’ historic undefeated season in 1972 and a two-time Super Bowl champion. His talent and passion left an incredible mark on the sport, and his three-time Pro Bowl selection cemented his place among football’s greats.

Off the field, Mercury was a devoted father, a loving brother, a loyal friend and a pillar of the community. His presence extended far beyond football as he touched the lives of many during his time in Miami.

Mercury is survived by his children Geno, Maceo, Tiffany, Troy and Elliott, and his siblings Cynthia, Valerie and Janice. His legacy will be carried on by those who knew and loved him most.

We extend our deepest condolences to his family, friends and all who had the honour of knowing him. His legacy will continue to inspire future generations, both in football and in his personal life.

The family asks for privacy during this difficult time.

Morris played seven seasons with the Dolphins after joining the team as a third-round draft pick in 1969 out of West Texas A&M. He appeared in 86 games, starting 42 of them, and had 3,877 rushing yards and 29 touchdowns. He was selected to the Pro Bowl in 1971, 1972 and 1973. As part of a three-headed monster in the backfield along with fullback Larry Csonka and halfback Jim Kiick, Morris was the spark that kept the team moving forward, turning their 1971 Super Bowl loss into a perfect season in 1972 and a repeat Super Bowl title in 1973. During the 1972 season, Morris reached the 1,000-yard mark, making Miami the first team in league history to have two running backs other than Csonka reach that milestone in the same season.

He played his final year with the San Diego Chargers in 1976, adding 256 yards and two touchdowns to his career totals.

Rest in peace, Mercury.

Photo by Jim McIsaac/Getty Images for Reebok