A battle of Big Ten unbeatens unfolds at Carver Hawkeye Arena, as the 4th-ranked Ohio State Buckeyes visit the No. 2 Iowa Hawkeyes for a Saturday afternoon league tilt.

Here are three potential options who could fill the Ohio State Buckeyes' defensive coordinator vacancy in 2025.

After he helped guide Ohio State to a national championship, Jim Knowles is finalizing a deal with Penn State to become the highest paid defensive coordinator in college football, ESPN reported Sunday.

Ohio State fans and dignitaries gathered at Ohio Stadium on Sunday to celebrate the Buckeyes' 2024 national championship run. Ohio State bested Notre Dame 34-23 in the College Football Playoff National Championship last week to win its first crown since 2014 and third since 1970.

The two were among tens of thousands of Ohio State fans who flooded the stadium Sunday to celebrate the Buckeyes' most recent national title and their second earned as part of the College Football Playoff. The Buckeyes won the first ever four-team playoff a decade ago and have now also won the first 12-team playoff.

Barrett quickly transitioned into coaching following the end of a college football career that spanned from 2013-17. He had a short NFL career spending time with the New Orleans Saints (twice), Seattle Seahawks and Pittsburgh Steelers from 2018-19. Then spent a season in the CFL with the Edmonton Elks in 2022.