Provo • BYU football coach Kalani Sitake continues to shuffle his coaching staff after last year’s disappointing 4-9 record left the Cougars out of a bowl game for the first time since 2004.

Sitake announced Friday that longtime defensive coach Steve Kaufusi is stepping down “to pursue other interests” and will be replaced by Weber State assistant Preston Hadley on the defensive staff.

Kaufusi was at BYU for 16 years and most recently coached the linebackers. Hadley, a former BYU defensive back, will coach the safeties.

BYU still has an open position for a 10th assistant coach. It will hire an additional offensive coach to complete its staff for the 2018 season, according to a school news release.

Hadley’s addition means that assistant head coach Ed Lamb will move from safeties coach to linebackers coach. Lamb is also the special teams coordinator.

Defensive coordinator Ilaisa Tuiaki and cornerbacks coach Jernaro Gilford will maintain their current responsibilities. Sitake will “also assist in coaching the defense in 2018,” according to the release.

BYU’s finished its worst season since 2004 ranked 51st in total defense, giving up 372.8 yards per game. Its biggest problem last season was offense, a situation Sitake hopes he remedied by releasing offensive coordinator Ty Detmer, receivers coach Ben Cahoon, running backs coach Reno Mahe and offensive line coach Mike Empey and replacing them with Jeff Grimes, Fesi Sitake, Aaron Roderick and Ryan Pugh.

A former BYU player, Kaufusi started his 24-year coaching career as a graduate assistant at Utah in 1994. He played three seasons in the NFL for the Philadelphia Eagles. His wife, Michelle, was sworn in as Provo’s first female mayor earlier this week.

“I’m honored to have had the opportunity to represent the university and everything it stands for,” Kaufusi said in the release. “I will always be a Cougar and look forward to watching my sons play at BYU.”

Corbin Kaufusi is entering his senior season as a defensive end and Devin Kaufusi joins the team this spring after having recently returned from an LDS Church mission.

“Anyone who knows Steve knows he is an exceptional coach and mentor to young men, which you can see in the players he has coached over the years and also in his own family,” Sitake said. “I wish Steve nothing but the best for his future.”

Hadley played high school football at Pleasant Grove before earning all-conference honors at Snow College. He started all 26 games at cornerback for BYU in 2011 and 2012 and made 117 tackles, 21 pass breakups and 2.5 sacks in two seasons.

He was a member of the 2012 BYU defense that finished the season ranked No. 3 in the country at 266.1 yards allowed per game.

“Preston is a leader and a coach who understands and knows how to teach the fundamentals and techniques of the game,” Sitake said. “He is a young, up-and-coming coach in this business who brings experience overseeing the entire secondary and as a recruiting coordinator. He will fit in perfectly with Jernaro in our defensive backfield and we are excited to welcome him back home to BYU.”

Hadley earned a master’s degree in coaching and athletic administration from Concordia University Irvine in 2016. He has been at Weber State the past two seasons and helped the Wildcats win the Big Sky Conference title and a school-record 11 games in 2017.