The Steelers have another position that needs to be filled in the offseason.
Steelers DC Keith Butler announced his retirement tonight in a statement released by the team.
"It is an emotional day as I announce I am retiring from my football coaching career," said Butler. "I have spent every year since 1990 as a coach in the NFL and the NCAA, but the time is right for me to walk away after a successful career both playing and coaching the game I love.
"I want to thank the Rooney Family, Bill Cowher, Mike Tomlin and all the coaches and players that I have been involved with over my entire coaching career. I look forward to spending more time with my family, whom have been so supportive of me throughout the years. I wish nothing but the best to the Pittsburgh Steelers, and I will be cheering them on during my retirement."