Damar Hamlin is kickstarting a campaign to spread CPR awareness and training following his on-field medical scare earlier this month ... teaming up with the American Heart Association to create the "3 For Heart" challenge.
The Buffalo Bills safety announced the move in an Instagram video ... saying, "Once again, I want to thank everybody for their love and support over these past few weeks."
"As you know, CPR saved my life earlier this year on the field, and CPR could easily save your life or someone you love.