Damar Hamlin's cardiac arrest on January 2 was caused by commotio cordis
Damar Hamlin is medically cleared to resume playing 4 months after cardiac arrest, Buffalo Bills GM says – Orlando Sentinel
Damar Hamlin's amazing recovery saved NFL from rushing back
Damar Hamlin is ready to complete his comeback as he prepares for Bills opener on Monday night
Damar Hamlin is medically cleared to resume playing 4 months after cardiac arrest, Buffalo Bills GM says – Orlando Sentinel
Bills S Damar Hamlin expected to be inactive for MNF
Damar Hamlin timeline from injury to return to Bills, Football
Don't blame NFL for injury to Damar Hamlin
Damar Hamlin injury isn't the most important part of the Bills safety's story - ESPN
Going home: Bills' Hamlin released from Buffalo hospital