Knowles, a Philadelphia native with strong ties to the Northeast, transformed the Buckeyes' defense during an impressive three-year stint. Ohio State ranked top three in total defense each of the past two seasons and led the nation by holding opponents to 254.6 yards per game and 4.2 yards per play during a historic campaign.

However, Knowles wasn’t in attendance. About an hour later, reports surfaced that Knowles is leaving Ohio State to serve as Penn State’s next defensive coordinator. The move leaves Day searching for a replacement. Here’s who he might consider as he enters his seventh season as the Buckeyes' head coach.

Week 1 of the 2025 college football season features a loaded slate, including LSU at Clemson, Notre Dame at Miami and Alabama at Florida State, among others. LSU-Clemson could be a top-five matchup, as could the biggest headliner: Manning and Texas visiting Ohio State in a matchup of the 2024 national champion and our early 2025 favorite.

Penn State has lured Tom Knowles away from Ohio State. The Nittany Lions have hired Knowles to serve as their defensive coordinator.

The go-big hire of Ohio State's Jim Knowles signals a shift for Penn State football: Why it means so much now and later

Guerrieri represents the continuity option. He's a Knowles guy through and through, initially coming with him to Ohio State as a senior analyst back in 2022. After a year apart at Indiana in 2023, Knowles missed him so much that he convinced Day to bring him back to Columbus, where he spent this past season as safeties coach.

Penn State football entered rarified air by stealing Ohio State defensive coordinator Jim Knowles away from the defending national champions.

Jim Knowles is expected to take the same position at Penn State, as first reported by Yahoo Sports' Ross Dellenger. The two sides are finalizing a three-year deal reportedly worth $3.1 million per season, making him the first college football coordinator to earn an annual salary of at least $3 million.

The Ohio State Buckeyes capped off a great season with a historic College Football Playoff National Championship win, but defensive coordinator Jim Knowles found himself elsewhere for the celebration.

Ohio State asked defensive coordinator Jim Knowles to skip the team's College Football Playoff national championship celebration while he considered a

COLUMBUS, Ohio — Ohio State defensive coordinator Jim Knowles agreed to a deal to serve the same position at Penn State. The Nittany Lions hired Knowles on Monday to replace Tom Allen, who left to take the same job with Clemson after Penn State fell to Notre Dame in the College Football Playoff semifinals.