Grambling State Athletic Director J. Lin Dawson announced the return of the College Hall of Famer in a statement, saying Williams has signed a four-year contract that begins March 1. Financial details were not disclosed.
He later succeeded Eddie Robinson as coach at his alma mater, winning three straight Southwestern Athletic Conference titles from 1998-2003.
The 55-year-old Williams, a native of Zachary, La., replaces Rod Broadway, who resigned earlier this month to become head coach at North Carolina A&T.
Williams will coach his quarterback son D.J., who signed with Grambling this year.
“I think it is truly an honor to be able too go back to Grambling State University for a third time and to be the second coach to coach his son. The only other guy to do this was Coach Eddie Robinson,” Willliams said in the same statement issued by the school.
Williams was drafted out of Grambling by the Tampa Bay Buccaneers in the first round of the 1978 NFL draft. He led the Bucs to the playoffs for the first time and repeated the feat twice in four years.
Williams was the first black quarterback to play in a Super Bowl. This past weekend, he was inducted into the Black College Football Hall of Fame.
(This version CORRECTS Corrects that Williams in College Hall of Fame in 2nd paragraph. Minor edits)