UPDATE Buffalo Bills Damar Hamlin Injury Monday Night Football Cincinnati Bengals Cardiac Arrest

UPDATE: The Bills say Damar Hamlin suffered a cardiac arrest. His heartbeat was restored on the field and he was transferred to the UC Medical Center for further testing and treatment. 

He is currently sedated and listed in critical condition.

The Buffalo Bills have suffered a lot of injuries to their secondary. Damar Hamlin's was the scariest.

The safety was injured in the first quarter of the Bills game against the Cincinnati Bengals on Monday Night Football.

Hamlin tackled Cincinnati wide receiver Tee Higgins, got to his feet and then crumpled to the ground. A stretcher and ambulance came onto the field as most of the Bills' roster came off the sideline to kneel or stand around Hamlin.