Greg Schiano will not return as defensive coordinator at Ohio State and will be replaced by a pair of veteran coaches, the school announced Monday.

Serving as co-defensive coordinators will by Greg Mattison, most recently the defensive line coach at Michigan, and Jeff Hafley, who coached the defensive backs for the San Francisco 49ers.

New Ohio State coach Ryan Day, of Manchester, N.H., also announced that defensive line coach Larry Johnson will add the title of associate head coach.

Since neither was mentioned in Ohio State’s news release announcing the defensive coaching staff, it appears linebackers coach Bill Davis and cornerbacks coach Taver Johnson will not return.

“I love the idea of having two coordinators on defense,” Day said in the release. “I like having a diversity of opinion, but even more I like the expertise and experience that Jeff has in the secondary coupled with the expertise that Greg brings to the front seven.

“Larry’s experience at Ohio State will allow him to have a major role in the guidance and direction of the program. His promotion to associate head coach is well earned. Larry is a wonderful teacher and mentor, and his players always become a part of his family. I am thrilled that he will continue to be a part of this program.”

Day has worked with both new hires before. He and Hafley spent one season on fellow Granite Stater Chip Kelly’s 49ers staff in 2016. He worked with Mattison in 2005 on Urban Meyer’s staff at Florida.

Schiano, 52, joined Ohio State in 2016 as defensive coordinator after previously serving as head coach for Rutgers for 11 season and the NFL’s Tampa Bay Buccaneers for two. But his defense has been widely criticized in Columbus, as the Buckeyes gave up an average of 25.5 points per game this year, tied for 51st in the nation.

A 49-20 loss to Purdue in 2018 and a 55-24 shellacking by Iowa in 2017 helped to keep Ohio State out of the College Football Playoff the past two seasons. The Buckeyes surrendered 539 yards to Purdue and 487 to Iowa.

Mattison, 69, has a long coaching history that includes two prior stints at Michigan, the most recent one beginning in 2011, and stops with Notre Dame, Florida and the Baltimore Ravens. He served as the Wolverines’ defensive coordinator from 2011-14 for then-head coach Brady Hoke.

Hafley, 39, started his coaching career in 2001, just after graduating from Siena College. He has made several NCAA and NFL stops, including one year at Rutgers and two years with the Buccaneers as a Schiano assistant.

Haskins declares for draft

Ohio State star quarterback Dwayne Haskins Jr. announced Monday that he is declaring for the NFL draft. The third-year sophomore revealed his decision on his Twitter account after putting together a monster campaign in his only season as a college starter.

Haskins set Big Ten single-season records with 4,831 passing yards and 50 passing TDs. He threw just eight interceptions and finished third in the Heisman Trophy balloting behind winner Kyler Murray of Oklahoma and Tua Tagovailoa of Alabama.