What happened to Buffalo Bills safety Damar Hamlin?
Bills safety Damar Hamlin returns to action in first regular-season game since cardiac arrest - The San Diego Union-Tribune
Damar Hamlin injury update: Buffalo Bills player awake and conscious, asks 'did we win?' - ABC7 Chicago
Former NFL team doctor explains Damar Hamlin's collapse, medical staff protocols
Damar Hamlin situation rekindles questions over NFL player contracts - The Athletic
The blow Damar Hamlin suffered: These strong impacts cause arrhythmias that can be lethal
Buffalo Bills' Damar Hamlin Reveals Official Cause of His Collapse - E! Online
Bills safety Damar Hamlin returns to action in first regular-season game since cardiac arrest – WWLP
Former NFL team doctor explains Damar Hamlin's collapse, medical staff protocols