Damar Hamlin Bills safety Damar Hamlin stands over Vikings receiver Adam Thielen after a catch. Syndication Democrat And Chronicle

Buffalo Bills safety Damar Hamlin collapsed on the field Monday night against the Cincinnati Bengals after a routine hit on Bengals wide receiver Tee Higgins.

Hamlin suffered cardiac arrest while attempting to stand to his feet and fell back to the turf. He received CPR in front of his teammates before medical staff whisked him away to a Cincinnati hospital.

Any doctor will tell you that time is of the essence in such a situation. And as grim as that situation got on Monday, it could’ve been a lot worse if not for one specific hero in the situation.

“One hero who should be recognized here: Last night, I was told the work of Bills assistant athletic trainer Denny Kellington in administering CPR to Damar Hamlin on Monday was absolutely vital. The speed and skill with which he and others reacted = A huge difference-maker,” NFL insider Albert Breer tweeted.

Hamlin showed signs of progress Thursday afternoon, according to the Bills.

“Per the physicians caring for Damar Hamlin at the University of Cincinnati Medical Center,” the Bills said in a statement, “Damar has shown remarkable improvement over the past 24 hours.

“While still critically ill, he has demonstrated that he appears to be neurologically intact. His lungs continue to heal, and he is making steady progress. We are grateful for the love and support we have received.”

[Albert Breer]