FILE - In this Aug. 9, 2019, file photo, Pittsburgh Steelers Ryan Shazier, center, watches warmups before an NFL preseason football game against the Tampa Bay Buccaneers in Pittsburgh. The Pittsburgh Steelers have placed the inside linebacker Ryan Shazier on the reserved/retired list. (AP Photo/Keith Srakocic, File)PITTSBURGH Pittsburgh Steelers linebacker Ryan Shazier announced his retirement on Wednesday, nearly three years after a severe spinal injury forced the two-time Pro Bowler to put his career on hold. For you to play the game of football the way I did, you convince yourself youre Superman. For 20 years, he let me play football, and now its time for me to do what he wants me to do.Shazier scheduled a news conference for later Wednesday afternoon to further detail his decision.