Duffie comes to Grobe's staff from Colorado State, where he spent the past four seasons tutoring both the Rams' secondary and cornerbacks in addition to being a primary recruiter for the state of Texas.
While in Fort Collins, Duffie was heavily involved in recruiting much of CSU's top talent and was instrumental in helping CSU finish the 2011 regular season ranked 14th in the nation by allowing just 179.6 passing yards per game.
Duffie joined Colorado State from the University of Texas-El Paso, where he had coached for nine seasons. Soon after graduating from Texas Tech as a student-athlete, he joined the Miners' staff as a defensive graduate assistant (2000-01), then coached UTEP safeties (2002-03, 2007) and linebackers (2004-06).
In addition to his role at UTEP, Duffie worked with the Detroit Lions in the summer of 2001 in a coaching fellowship.
As an undergrad, Duffie played linebacker at Texas Tech for four years (1996-99) and started 16 games for the Red Raiders. He finished his career with 202 stops, six tackles for loss, one sack, three passes broken up and two interceptions. As a senior, in 1999, he started all 11 games and racked up a single-game career-high 18 tackles at Missouri.
Born May 28, 1977, in Jefferson, Texas, Duffie and his wife, Autumn, have two sons, Memphis and Manhattan. He also has a son, Timias. Duffie holds a bachelor's degree in exercise and sports science (Texas Tech, '99) and a master's in education administration (UTEP, '02).