Guy's was hired Jan. 6, along with former Tennessee defensive back coach Larry Slade and former Southern Mississippi offensive coordinator Jay Johnson. Guy was the head coach at Utah State but was fired this year after going 9-38 in four seasons.
"Brent has a tremendous amount of experience and success as a defensive coordinator," said Kragthorpe. "I loved his defenses at Boise State and Arizona State. Those teams put up some excellent defensive numbers and he coached some great players. Guy's teams played great fundamental football and were well-coached."
Guy replaces Bill Miller, who resigned last weekend to become the linebacker coach and co-defensive coordinator at Kansas. Miller replaced Ron English after English accepted the head coaching job at Eastern Michigan following the 2008 season.
An experienced coach, Guy served as defensive coordinator at Boise State (1998-2000) and Arizona State (2001-04).
Antonio Goss, an assistant at Middle Tennessee for three years, was hired as the special teams coach, replacing Mark Nelson. Goss will also coach safeties. Larry Slade will also be a secondary coach. Guy will also serve as linebacker coach.
"Antonio brings a great deal of experience, not only as a coach, but as a very successful player in the National Football League, which included two Super Bowl wins and was the special teams coordinator for the San Francisco 49'ers," said Kragthorpe. "I was impressed with the way his players played at Buffalo, while I was coaching at the Buffalo Bills, and liked the way his Middle Tennessee players played versus us the last couple seasons."
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While serving as Arizona State's defensive coordinator for four seasons, Guy left the Sun Devils in great shape. In 2004, ASU went 9-3 and defeated Purdue in the Sun Bowl. That marked the Sun Devils' second bowl appearance in three years. ASU's defense finished 2004 ranked 28th nationally in rushing defense, 32nd in pass efficiency defense and 48th in both total and scoring defense.
In 2002, Guy's defense forced 40 turnovers, including 22 interceptions. Those totals ranked third and fourth in the country, respectively. In addition, ASU recorded an incredible 123 tackles for loss, including 52 sacks that season.
As the defensive coordinator at Boise State from 1998-2000, he helped the Broncos become the cream of the league as BSU won the 1999 and 2000 Big West Championships posting a 10-1 combined conference record in those two years. BSU then went on to win consecutive Humanitarian Bowls after those seasons.
Under his guidance, Boise State led the Big West in total defense, rushing defense and scoring defense in both 1999 and 2000. In 1999, the Broncos ranked 28th in the nation in scoring defense allowing just 20.5 points per game.
Guy, who has been a part of nine bowl teams in his playing and coaching career, had two stints coaching at his alma mater of Oklahoma State. After serving as a graduate assistant (1986-87) and recruiting coordinator (1988) there, Guy coached the Cowboy linebackers from 1989-91 and then again from 1995-97.
Guy began his playing career at Oklahoma State as a walk-on and became a starter at both defensive end and linebacker. As a senior in 1982 he started at linebacker and recorded 106 tackles to rank third on the team. He also had three tackles for loss, recovered one fumble, had one interception and broke up seven passes.