Buffalo Bills second-year safety Damar Hamlin had taken key role
The Reaction to Damar Hamlin's Collapse Represents Progress
Damar Hamlin updates: Latest condition, what we know about why it happened
Damar Hamlin showing 'remarkable improvement over past 24 hours'
What happened to Damar Hamlin? Explaining Commotio Cordis
Doctors explain why Buffalo Bills safety Damar Hamlin collapsed as support pours in from fans, players - CBS New York
Bills player Damar Hamlin is in critical condition after on-field collapse and Bills-Bengals game is postponed – NBC Palm Springs
KUOW - Who is Damar Hamlin? The Buffalo Bills safety keeps Pittsburgh and his family close
Family of Buffalo Bills' Hamlin, 24, thank 'dedicated first responders' who helped resuscitate him