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Coaches

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Mark Duffner
Linebackers Coach

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Biography

Mark Duffner begins his second season with the Buccaneers in 2017, as the team’s linebackers coach.

In his first year with the Buccaneers, linebacker Lavonte David was voted as a Pro Bowl alternate while recording 17 tackles for loss, tied for the league lead. David was also one of only two players to record at least 80 tackles and 5.0 sacks (also Benardrick McKinney). Linebacker Kwon Alexander led the team in tackles, with 145, the fourth-most in the NFL, including a league-best 108 solo tackles.

Duffner brings a wealth of coaching experience to Tampa Bay, with 19 previous years in the NFL and 22 years in the college ranks, including 11 as a collegiate head coach. He joins the Buccaneers after most recently having coached linebackers with the Miami Dolphins (2014-15).

While with the Dolphins, Duffner helped bring Jelani Jenkins from a chiefly special teams player into a starting role, where Jenkins proceeded to lead the team with 108 tackles in 2014, becoming one of only three players in the NFL that season to record 100+ tackles, 3.5 or more sacks and two-or-more forced fumbles.

Prior to his time with Miami, Duffner spent eight seasons (2006-13) coaching linebackers with the Jacksonville Jaguars, where he helped Paul Posluszny earn a Pro Bowl selection following the 2013 season, marking the first time a Jacksonville linebacker had earned that distinction since 1999.

From 2003-05, Duffner worked with the Green Bay Packers, where he was instrumental in developing first-round draft pick Nick Barnett, who led the team in tackles for each of his three years under Duffner’s instruction. In 2005, the Green Bay defense finished the season ranked first in the league against the pass and seventh overall.

Duffner’s first foray into the NFL came with the Cincinnati Bengals, where he spent six seasons as linebackers coach (1997-2000) and defensive coordinator (2001-02). In his first year as coordinator in 2001, the Bengals defense allowed the unit’s fewest points (309) since 1989 and fewest yards per game (302) since 1983. In addition, the defense set a franchise single-season record for sacks that year with 48, a mark that stood for 11 seasons.

In the college coaching ranks, Duffner compiled an 80-40-1 record as a collegiate head coach for both the University of Maryland (1992-96) and The College of the Holy Cross (1986-91). While with the Terrapins, Duffner led the team to their best two-season record in over a decade during his final two years, as well as seeing Maryland return to the national rankings in 199 for the first time in nine seasons. As head coach of the Crusaders, Holy Cross won five Patriot League championships, four Lambert Cups and four ECAC Team of the Year awards. Duffner’s team also earned the No. 1 ranking in the final 1987 NCAA Division I-AA poll. He was named Patriot League Coach of the Year four times, while also earning National Coach of the Year honors in 1987 and 1991. Duffner’s .917 winning percentage (60-5-1) was the best in school and Patriot League history when he left the program. He was inducted into The College of Holy Cross Hall of Fame in 2008.

Duffner broke into coaching as a graduate assistant at Ohio State, working under Woody Hayes from 1975-76 while he earned a master’s degree. He moved on to the defensive coordinator’s role at the University of Cincinnati, a position he held for four years, from 1977-80.

Originally from Annandale, Virginia, Duffner played collegiate football at William & Mary from 1972-74. He was inducted into the Tribe’s Hall of Fame in 1990.

Duffner and his wife, Kathy have two daughters, Christina and Carolyn, and one son, John, as well as two granddaughters, Camilla and Ava.

DUFFNER AT A GLANCE

YEARS

POSITION

1972-74

William & Mary, Player

1975-76

Ohio State, Graduate Assistant

1977-1980

University of Cincinnati, Defensive Coordinator

1981-85

The College of the Holy Cross, Defensive Coordinator

1986-91

The College of the Holy Cross, Head Coach

1992-96

University of Maryland, Head Coach

1997-2000

Cincinnati Bengals, Linebackers Coach

2001-02

Cincinnati Bengals, Defensive Coordinator

2003-05

Green Bay Packers, Linebackers Coach

2006-13

Jacksonville Jaguars, Linebackers Coach

2014-15

Miami Dolphins, Linebackers Coach

2016-

Tampa Bay Buccaneers, Linebackers Coach

Mark Duffner begins his second season with the Buccaneers in 2017, as the team’s linebackers coach.

In his first year with the Buccaneers, linebacker Lavonte David was voted as a Pro Bowl alternate while recording 17 tackles for loss, tied for the league lead. David was also one of only two players to record at least 80 tackles and 5.0 sacks (also Benardrick McKinney). Linebacker Kwon Alexander led the team in tackles, with 145, the fourth-most in the NFL, including a league-best 108 solo tackles.

Duffner brings a wealth of coaching experience to Tampa Bay, with 19 previous years in the NFL and 22 years in the college ranks, including 11 as a collegiate head coach. He joins the Buccaneers after most recently having coached linebackers with the Miami Dolphins (2014-15).

While with the Dolphins, Duffner helped bring Jelani Jenkins from a chiefly special teams player into a starting role, where Jenkins proceeded to lead the team with 108 tackles in 2014, becoming one of only three players in the NFL that season to record 100+ tackles, 3.5 or more sacks and two-or-more forced fumbles.

Prior to his time with Miami, Duffner spent eight seasons (2006-13) coaching linebackers with the Jacksonville Jaguars, where he helped Paul Posluszny earn a Pro Bowl selection following the 2013 season, marking the first time a Jacksonville linebacker had earned that distinction since 1999.

From 2003-05, Duffner worked with the Green Bay Packers, where he was instrumental in developing first-round draft pick Nick Barnett, who led the team in tackles for each of his three years under Duffner’s instruction. In 2005, the Green Bay defense finished the season ranked first in the league against the pass and seventh overall.

Duffner’s first foray into the NFL came with the Cincinnati Bengals, where he spent six seasons as linebackers coach (1997-2000) and defensive coordinator (2001-02). In his first year as coordinator in 2001, the Bengals defense allowed the unit’s fewest points (309) since 1989 and fewest yards per game (302) since 1983. In addition, the defense set a franchise single-season record for sacks that year with 48, a mark that stood for 11 seasons.

In the college coaching ranks, Duffner compiled an 80-40-1 record as a collegiate head coach for both the University of Maryland (1992-96) and The College of the Holy Cross (1986-91). While with the Terrapins, Duffner led the team to their best two-season record in over a decade during his final two years, as well as seeing Maryland return to the national rankings in 199 for the first time in nine seasons. As head coach of the Crusaders, Holy Cross won five Patriot League championships, four Lambert Cups and four ECAC Team of the Year awards. Duffner’s team also earned the No. 1 ranking in the final 1987 NCAA Division I-AA poll. He was named Patriot League Coach of the Year four times, while also earning National Coach of the Year honors in 1987 and 1991. Duffner’s .917 winning percentage (60-5-1) was the best in school and Patriot League history when he left the program. He was inducted into The College of Holy Cross Hall of Fame in 2008.

Duffner broke into coaching as a graduate assistant at Ohio State, working under Woody Hayes from 1975-76 while he earned a master’s degree. He moved on to the defensive coordinator’s role at the University of Cincinnati, a position he held for four years, from 1977-80.

Originally from Annandale, Virginia, Duffner played collegiate football at William & Mary from 1972-74. He was inducted into the Tribe’s Hall of Fame in 1990.

Duffner and his wife, Kathy have two daughters, Christina and Carolyn, and one son, John, as well as two granddaughters, Camilla and Ava.

DUFFNER AT A GLANCE

YEARS

POSITION

1972-74

William & Mary, Player

1975-76

Ohio State, Graduate Assistant

1977-1980

University of Cincinnati, Defensive Coordinator

1981-85

The College of the Holy Cross, Defensive Coordinator

1986-91

The College of the Holy Cross, Head Coach

1992-96

University of Maryland, Head Coach

1997-2000

Cincinnati Bengals, Linebackers Coach

2001-02

Cincinnati Bengals, Defensive Coordinator

2003-05

Green Bay Packers, Linebackers Coach

2006-13

Jacksonville Jaguars, Linebackers Coach

2014-15

Miami Dolphins, Linebackers Coach

2016-

Tampa Bay Buccaneers, Linebackers Coach