Buffalo Bills second-year safety Damar Hamlin had taken key role
Bills' Hamlin in critical condition after collapse on field
Damar Hamlin showing 'remarkable improvement,' Buffalo Bills say
Damar Hamlin, former Pitt and Central Catholic star, in critical condition after going into cardiac arrest during Bills-Bengals game
Who is Buffalo Bills safety Damar Hamlin? - The Washington Post
Covering the possible causes and diagnoses of Damar Hamlin's injury - Poynter
Bills safety Damar Hamlin returns