After three years of leading some of the best defensive units in college football, Jim Knowles has returned ... back a familiar face. Jeff Hafley is the defensive coordinator for the Green Bay ...

During his six seasons as defensive coordinator ... major college football allowed fewer points or yards per game than Ohio State, the culmination of years-long effort led by Knowles who took ...

COLUMBUS, Ohio — Ohio State football is finalizing ... He replaces Jim Knowles, who left Ohio State to serve as Penn State’s defensive coordinator. Knowles ran OSU’s defense since 2022.

Ohio State has landed its replacement for outgoing defensive coordinator Jim Knowles, who left for Penn ... Day's first DC hire at Ohio State was Jeff Hafley, who came right out of the NFL as ...