Keith Butler Retires As Steelers' Defensive Coordinator
Around the AFC North: Steelers Expected to Name Teryl Austin Defensive Coordinator
Longtime Steelers defensive coordinator Keith Butler announces retirement
The Best N.F.L. Trade of the Season? Look to Pittsburgh - The New York Times
Steelers defensive coordinator Keith Butler retires
Reports: Steelers to promote Teryl Austin to defensive coordinator position
Keith Butler wants linebackers to shine in Pittsburgh Steelers' D
Stephon Tuitt - NFL News, Rumors, & Updates
Steelers will retain defensive coordinator Keith Butler with a one-year contract, per report
Longtime Steelers defensive coordinator Keith Butler announces retirement
Pittsburgh Steelers legend: An inside look at Dick LeBeau – WPXI
Pittsburgh Steelers hire Keith Butler as new defensive coordinator - Sports Illustrated
Steelers defensive coordinator Keith Butler announces retirement