Michigan sits as the No. 2 defense in the nation following a shutout victory of BYU. While the group has looked strong in the first four-games, defensive coordinator D.J. Durkin thinks the group can do even better. Here’s what Durkin told Jim Brandstater on the radio Monday evening. https://twitter.com/Mark__Snyder/status/648641155614310400 https://twitter.com/Mark__Snyder/status/648640056706625536