Damar Hamlin collapsed during an NFL game. What happened? - Vox
Damar Hamlin Was 'a Little Scared' to Return to Padded Football Practice
NFL: Damar Hamlin cleared to play again after cardiac arrest, American Football News
Damar Hamlin injury update: The NFL response shows the league isn't built for this.
Doctors say Bills S Damar Hamlin's 'substantial improvement' marks 'a really good turning point in his ongoing care'
Examining football's health risks after Damar Hamlin's cardiac arrest on the field
Damar Hamlin's Recovery From Cardiac Arrest
Damar Hamlin will play football again, NFL players union doctor says
NFLPA Medical Director: Damar Hamlin Will Play Football Again
Damar Hamlin updates: Bills safety asked in writing if team won game