Former Ohio State defensive coordinator Jim Knowles said he was grateful for his three years at OSU, but the pull of his home state lured him away.

Jim Knowles was introduced as Penn State's defensive coordinator on Tuesday. Here's what he said about leaving Ohio State football.

Ohio State is coming off a national championship season in which Knowles defense was ranked No. 1 in fewest yards allowed per game (254.6) and fewest points per game (12.9). Penn State made it to the Final Four. It will take time for Penn State’s defensive assistants and players to get on the same page with Knowles.