Larry Mac Duff (born June 22, 1948) is an American football coach and former player.
Mac Duff was Special Teams Coordinator for the San Francisco 49ers for four years (2003–2006).
Mac Duff has helped mentor a Nagurski Trophy winner (Rob Waldrop – 1993), an Outland Trophy winner (Waldrop – 1993), a Thorpe Award winner (Darryll Lewis – 1990), a Lombardi Award finalist / NCAA Career Sack Champion (Tedy Bruschi – 1995), and five Pac-10 Defensive Players of the Year.
[citation needed] Mac Duff was co-defensive coordinator for the University of Texas, during their 2007 season, which culminated with 10 wins and a victory over Arizona State in the Holiday Bowl.
[1] In 2019, he was the linebackers coach and special teams coordinator for the San Diego Fleet of the Alliance of American Football (AAF).