He’s not the Pittsburgh Steelers defender who has been in the league the longest—both Joe Haden and Tyson Alualu were drafted a year earlier than he was—but Cameron Heyward is the longest-tenured defender on the team by two years, over Vince Williams, originally drafted in the first round of the 2011 NFL Draft.
He has represented his team in the Pro Bowl in three consecutive seasons now, the first lineman with the team to do that since Casey Hampton made three consecutive trips to the Pro Bowl between 2005 and 2007 (and also 2003 and 2009; he was injured in 2004, and also missed three games in 2008).