The Bears have added a pair of Vikings coaches to the list of those who will be interviewed for the head coaching vacancy.  According to Vikings head coach Leslie Frazier, Mike Singletary and Mike Priefer will both get a shot at the job.  The Bears also reportedly interviewed their own special teams coach, Dave Toub, for the job this week.  Chicago also has permission to interview Texans offensive coordinator Rick Dennison and Seahawks offensive coordinator Darrell Bevell.