The Jacksonville Jaguars today named Mark Duffner as linebackers coach. Duffner, 53, spent the past three seasons as the linebackers coach for the Green Bay Packers. He has more than 30 years of coaching experience, including 11 seasons as a college head coach and 10 seasons in the NFL.

The Packers defense finished the 2005 season as the seventh ranked defense in the NFL (ranked No. 1 against the pass) and linebacker Nick Barnett set the team record with 194 tackles (128 solo) and became the first Packer to lead the team in tackles for three consecutive seasons.

Duffner's professional coaching career began as a graduate assistant under Woody Hayes at Ohio State (1975-76) before serving as defensive coordinator at the University of Cincinnati (1977-80) and Holy Cross (1981-85). He later served as head coach at Holy Cross (1986-91) and at Maryland (1992-96) before moving to the NFL ranks. As head coach at Holy Cross, Duffner compiled a 60-5-1 mark that included two 11-0 seasons (1987 and 1991) during his six seasons.

He spent six seasons with the Cincinnati Bengals where he served as linebackers coach (1997-2000) and defensive coordinator (2001-02). In 2001, the Bengals defense allowed the fewest points since 1989 and fewest yards per game since 1983. In addition, the defense set a franchise single-season record for sacks with 48 in 2001.

Duffner played collegiately at William & Mary and was later inducted into the school's Hall of Fame in 1990. He and his wife Kathy, have three children: daughters Christina and Carolyn and son, John.