The document provides biographies and background information on the defensive coaching staff and key defensive players for the University of Minnesota football team. Tracy Claeys is the defensive coordinator and has transformed the defense since arriving in 2010. Jerry Kill is the head coach and has over 20 years of coaching experience. Bill Miller and Jeff Phelps have also helped improve the defense with their experience. Jay Sawvel coaches the defensive backs and special teams. The document highlights several defensive standouts from the 2013 season, including Ra'Shede Hageman, Damien Wilson, and Theiren Cockram.