Damar Hamlin's NFL Comeback After Cardiac Arrest Cleared.
NFL safety Damar Hamlin, who collapsed on the field due to commotio cordis earlier this year, has been cleared to return to the game in September and is now focused on raising awareness for the rare cardiac condition that caused his collapse. Hamlin's foundation, Chasing M, will be raising awareness for CPR training and efforts to provide defibrillators to youth sports. Commotio cordis is the leading cause of death in youth athletes across all sports.