By Chris Rosvoglou Patrick Graham’s decision to join the Las Vegas Raiders has left the New York Giants with an opening at defensive coordinator. Fortunately for the G-Men, there are plenty of intriguing options on the market. One of those options is Pittsburgh Steelers senior defensive assistant/secondary coach Teryl Austin. According to ESPN insider Adam Schefter, the Giants have requested permission to interview Austin. However, there’s no guarantee the Steelers will grant the Giants permission to interview Austin. That’s because he’s one of the finalists for their own opening at defensive …