Buffalo Bills safety Damar Hamlin in critical condition after cardiac arrest, team says – WSB-TV Channel 2 - Atlanta
Covering the possible causes and diagnoses of Damar Hamlin's injury - Poynter
Explainer: What Happened to Buffalo Bills Player Damar Hamlin?, Chicago News
NFL Cancels Bills Game After Damar Hamlin Suffers Cardiac Arrest
Damar Hamlin in critical condition after cardiac arrest during game
Damar Hamlin breathing on his own: Buffalo Bills - BBC News
What Is Commotio Cordis? What Happened to NFL Player Damar Hamlin
What caused Buffalo Bills' player Damar Hamlin's cardiac arrest? Doctors speculate, shed light on frightening ordeal
Who is Damar Hamlin, the Buffalo Bills player who collapsed at Monday's game? : NPR
Buffalo Bills star Damar Hamlin's on-field collapse puts spotlight on cardiac arrest in young people - ABC News