Muncie and fellow Saints running back Tony Galbreath formed what then-coach Hank Stram dubbed the "Thunder and Lightning" combination in the New Orleans backfield. Muncie's photo is among those featured on the Saints' Hall of Honor inside the club's training facility.
Saints owner Tom Benson said in a written statement that the Saints were mourning Muncie's "untimely passing," adding, "Our thoughts and prayers go out to his family and other loved ones at this difficult time."
Muncie was traded by the Saints at midseason in 1980 to San Diego, where he played 51 games and was named to Pro Bowl rosters two more times, in 1981 and '82. In 2009, the club recognized him as one of the 50 greatest Chargers of all time.
His accomplishments on the field came despite cocaine use, and in 1989, five years after his retirement from pro football, Muncie was sentenced to 18 months in prison for a cocaine distribution conviction.
Thereafter, however, he began sharing his life story with at-risk youth, highlighting his struggles with drug abuse. He created the Chuck Muncie Youth Foundation, the mission of which was to offer children mentoring, educational assistance and counseling.
"His work with at-risk youth, the Boys and Girls Clubs and his foundation were the things that really made him shine," Muncie's daughter, Danielle Ward, said in a written statement provided by Foster.