The have only had three head coaches since 1969 and aren't about to let their current one go any time soon. Mike Tomlin and the club have agreed to an extension through the 2018 season, the team announced Matt Mooney Jersey Thursday. Tomlin, 43, has been the head coach in Pittsburgh since 2007.NFL Media Insider Ian Rapoport reported the among the three-to-five highest paid coaches in the NFL...