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Mark Duffner leaving to join Dolphins staff

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Duffner coached the Jaguars linebackers for eight seasons and was the only coach remaining from the Jack Del Rio era.

Kirby Lee/Image of Sport-USA TODAY Sports

The Jaguars will have at least one change in their coaching staff after all, as Mark Duffner has elected to make a lateral move and join the Miami Dolphins with the same position, according to J.P. Shadrick of Jaguars.com.

Duffner, 60, was one of only two coaches that was retained by the Jaguars upon the hiring of head coach Gus Bradley in January 2013, and was the only remaining coach from the Jack Del Rio/Shack Harris era of the franchise.

Originally hired in 2006 by the team, Duffner coached eight seasons with the Jaguars, working most with players like Daryl Smith, Russell Allen and Paul Posluszny.

Per Shadrick, Duffner elected to join the Dolphins due to a connection with head coach Joe Philbin. The pair worked together from 2003-2005 when both were on staff with the Green Bay Packers. Duffner also previously served as the head coach for the Maryland Terrapins.

Shadrick also reported that athletic trainer Mike Ryan will pursue other opportunities.