It appears that Knowles didn't take long to shuck his scarlet red colors and put on the blue and white at Penn State, taking aim at the conference leaders. It's a huge get for Penn State, who already had one of the most productive defenses in the nation last year, and now adds arguably the top defensive coordinator in the sport to the mix in 2025.

Ohio State star safety Caleb Downs gave his reaction on Monday to the departure of defensive coordinator Jim Knowles, who left for Penn State.

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