Steelers' Ryan Shazier announces retirement from NFL - ESPN
Steelers' Ryan Shazier retires from NFL after severe spinal injury, Pittsburgh Steelers
Steelers linebacker Ryan Shazier retires after three-year absence with spinal injury
Retired: Steeler Ryan Shazier announces retirement years after horrific in-game injury – KIRO 7 News Seattle
Steelers' Ryan Shazier retires from NFL after severe spinal injury, Pittsburgh Steelers
Ryan Shazier, Steelers LB, retires nearly 3 years after spinal injury
A look at other mid-game medical emergencies after Damar Hamlin's collapse - The Athletic
Steelers' Ryan Shazier, 28, retires from football nearly three years after spinal injury
Ryan Shazier's Injury Status Is Still Unclear, But It Looks Dire
Ryan Shazier injury: Steelers LB officially retires from NFL
Steelers' Ryan Shazier retires from NFL after severe spinal injury, Pittsburgh Steelers
Steelers can't survive Patriots; Jerry Richardson falls - Sports Illustrated