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Mark Duffner

Senior Defensive Assistant

College: William & Mary

Hometown: Annandale, Va.

Experience: 24 years

Biography

A Bengals assistant from 1997-2002, Mark Duffner returned to Cincinnati's coaching staff in '19 as senior defensive assistant. He now is in his 24th season as an NFL coach, and eighth with the Bengals' staff. Prior to his time in the NFL, Duffner coached 22 years in the college ranks, including 11 as a head coach.

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