 running back from the University of Kansas, Williams played for the 49ers, Miami Dolphins, and Green Bay Packers in eight NFL seasons from 1974 to 1981.A two-time Pro Bowl selection in 1976 and 1978, Williams rushed for over 1,200 yards in both those seasons.Shortly after retiring, Williams began a years-long collaboration with Nancy Reagan on her signature project to prevent teens from doing drugs called "Just Say No".