Damar Hamlin of the Buffalo Bills collapses on the field and experiences heart arrest; the game against the Bengals is postponed.

After Bills safety Damarious Randall was injured on Monday, the Buffalo Bills and Cincinnati Bengals game postponed

In the first quarter's last 5:58 seconds, Hamlin passed out. Hamlin is in critical condition, according to the NFL.

Hamlin had a heart attack, the Bills said early on Tuesday morning.

On the field, his heartbeat was revived before being taken to the University of Cincinnati Medical Center.

After a 13-yard gain, Hamlin, a second-year player from Pittsburgh, tackled Bengals wide receiver Tee Higgins.

It was an unremarkable play. Hamlin got to his feet but fell back down.

Onto the field was came an ambulance. CPR was performed on Hamlin for about ten minutes.

The NFL Players' Association approved of the choice to reschedule the contest.

"Damar Hamlin is in our community's prayers as well as those of the NFLPA,"