Getty (Photo by Justin Berl/Getty Images) The  Pittsburgh Steelers have an interesting predicament at the edge-rusher position this offseason. While future Hall of Fame edge-rusher and starter T.J. Watt is occupying one side of the defensive line, the other side of the line is a whole different story. Veteran  Alex Highsmith is the starter, but he is slated to turn 29 this year. Furthermore, he has recorded just one double-digit sack season in six years. Former fourth-round pick Nick Herbig is