Del Williams was a standout on the Florida State offensive line and was the only sophomore to start every game for the Seminoles in the 1964 season where they defeated Florida for the first time in school history. He was a third round pick (79th overall) of the New Orleans Saints in the 1967 NFL Draft and became a starter in his rookie campaign for the expansion club. He spent all seven of his seasons in the NFL with the Saints, playing in 92 contests. Williams played all five offensive line positions for the Saints at one time during his tenure with the club. He was released prior to the 1974 season and signed with the World Football League's Florida Blazers, who played out of Orlando. Williams was inducted to the Florida State Hall of Fame in 1982. Williams passed away late in 1984 from ALS, less than a year after being diagnosed.