Minnesota football coach Glen Mason announced Friday he has filled three openings on his staff, promoting defensive backs coach David Lockwood to defensive coordinator, hiring Kerry Cooks to take Lockwood’s place and signing Carey Bailey as defensive line coach.

Mason also reassigned Moe Ankney from defensive line coach to outside linebackers coach. Lockwood, who was the Gophers’ interim defensive coordinator, will coach the inside linebackers.

The hirings complete a staff overhaul that started when defensive coordinator Greg Hudson left for East Carolina before Minnesota’s appearance December in the Music City Bowl.

Mason fired wide receivers coach Richard Wilson and defensive line coach Tom Sims after the bowl game and hired Luke Tressel to take Wilson’s place Feb. 7.

Cooks, the former defensive backs and special teams coach at Western Illinois, was an all-Big Ten selection at Iowa and was drafted by the Minnesota Vikings in the fifth round of the 1998 NFL Draft. He also played for Green Bay, Atlanta and Jacksonville before retiring in 2001.

“It is great to be back in the Big Ten and to have an opportunity to work in the Midwest,” Cooks said in a statement. “I am looking forward to working with the rest of the staff and the team.”

Bailey comes to Minnesota from Oklahoma State, where he was the defensive line coach last season.

He held the same position at Middle Tennessee State in 2003, and he has worked at Louisiana-Lafayette, Virginia Military Institute and West Virginia as well.

“I am very excited to be joining such an outstanding program,” Bailey said. “Minnesota has a rich tradition and history, and I am looking forward to helping the program build off their current success and hopefully achieving a Big Ten championship.”