Just as Ohio State was celebrating its national championship victory at Ohio Stadium on Sunday, news broke that Jim Knowles was heading to Penn State.

Spirits were high in Columbus over the weekend as fans continued to celebrate the national championship win over the Notre Dame Fighting Irish from a few days before. Until Sunday afternoon. Then some rain dumped on the Buckeyes' championship parade,

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.

It was the furthest thing from a happy ending between the newly minted Penn State defensive coordinator Jim Knowles and his former school.

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

Knowles would fill the void on Penn State’s staff left by Tom Allen, who accepted the same position with Clemson earlier this month.

The media could not be loaded, either because the server or network failed or because the format is not supported.

Ohio State DC Jim Knowles is expected to become the new defensive coordinator at Penn State, sources tell @YahooSports. The two sides are in the process of finalizing an agreement. Big hire for James Franklin.

Ohio State offensive line coach Justin Frye is interviewing for the same position with the Chicago Bears according to the Chicago Tribune.

An Ohio State football support staffer was placed on administrative leave in December after becoming the subject of an unidentified university investigation, according to multiple reports. Quality control coach Joe Lyberger,

Knowles will make Penn State's defense one of the best in the country, but his addition might help the offense too.