JGThe senior bowl is right around the corner and the Dallas Cowboys are still trying to complete their coaching staff.  The word at Valley Ranch is that Jerry Jones and Jason Garrett have decided to keep secondary coach Jerome Henderson and quarterbacks coach Wade Wilson on the Cowboys coaching staff for the 2013 season. In other Cowboys news former Arkansas coach Houston Nutt will join the Cowboys coaching staff as the running backs coach and former Chicago Bears defensive coordinator Rod Marinelli will replace Brian Baker as the new defensive line coach.