Bills player Damar Hamlin had to be resuscitated twice after collapsing from a cardiac arrest on the field, uncle tells CNN, Sports
Damar Hamlin injury timeline
Damar Hamlin Makes an Early Impact in Returning to Field in Bills' Preseason Game Against Colts
Damar Hamlin injury isn't the most important part of the Bills safety's story - ESPN
Damar Hamlin ready to suit up for first preseason game since cardiac arrest
Bills' Damar Hamlin participates in first padded practice after in-game cardiac arrest
Damar Hamlin Cleared to Return to Football
Bills final injury report for London game: Hamlin, Benford, Lawson inactive
Damar Hamlin is ready to complete his comeback as he prepares for Bills opener on Monday night
Covering the possible causes and diagnoses of Damar Hamlin's injury - Poynter
Hamlin in Their Hearts, the NFL Pays Tribute to No. 3
Bills safety Damar Hamlin returns to action in first regular-season game since cardiac arrest
What is commotio cordis, which NFL player Damar Hamlin says stopped his heart?