Since the Buckeyes suffered a one-point loss on the road at No. 1 Oregon, Ohio State defensive coordinator Jim Knowles has been changing things up, mixing in new pressure packages, and new coverages in the secondary to keep opponents off-balance. 

That continued on Saturday against Purdue, as Knowles introduced three-man fronts, including the long-discussed Jack position, as well as some new and creative blitz packages and coverage schemes. 

In this episode of the Buckeyes TomOrrow Morning podcast, Ross Fulton, the Xs and Os guru at BuckeyeHuddle.com joins host Tom Orr to discuss what was new, and what to expect this weekend against Northwestern in Wrigley Field.