When the Pittsburgh Steelers brought in Mike Mitchell in free agency during the 2014 offseason to enter the starting lineup at free safety, they knew that they were bringing in a secondary player who was capable of rushing the passer. He recorded three and a half sacks in his one season of starting experience in the year prior, and had another three and a half sacks over his first four years in more limited playing time.
You might recall that safety Will Allen, he of the long career, had never recorded a sack until his final season with the Steelers in 2015, when he actually, inexplicably, recorded four.