When Damar Hamlin collapsed, the NFL deployed its emergency action plan - The Washington Post
Bills' Damar Hamlin in critical condition after collapse on field
Bills' Damar Hamlin in critical condition after collapse on field – News-Herald
What is commotio cordis, which NFL player Damar Hamlin says stopped his heart?
Bills safety Damar Hamlin released from Buffalo hospital
Who is Damar Hamlin, the Buffalo Bills player who collapsed at Monday's game? : NPR
Damar Hamlin 'will play professional football again,' NFL players union doctor says, Sports
Damar Hamlin makes early impact in Bills' preseason game
Hamlin's path back to playing football intersects with his hometown in Pittsburgh on Saturday