Here's everything we know (and don't know) about Damar Hamlin's game-ending injury during Bills-Bengals
See Buffalo Bills Honor Damar Hamlin With Ceremony, Opening Kickoff TD – Rolling Stone
Damar Hamlin Plays in First NFL Game Since His Cardiac Arrest
Damar Hamlin visits his Buffalo Bills teammates for the 1st time since going into cardiac arrest during a game – The Virginian-Pilot
Buffalo safety and former Pitt star Damar Hamlin in critical condition after collapse on field
Bills safety Damar Hamlin returns to action in first regular-season game since cardiac arrest - WTOP News
Damar Hamlin's Return to Football Looks Almost Normal - The New York Times
Bills safety Damar Hamlin returns to action in first game since cardiac arrest – NewsNation
Shocking scene as Bills player Damar Hamlin suffers cardiac arrest at NFL game
Bills GM: Damar Hamlin medically cleared to resume playing