I think they mentioned that that had only happened once before in the 70s. Injuries are common but what happened to Hamlin is not.
To a football player yes...rare. It happened to Chuck Hughes of the Detroit Lions in 1970... that’s the only other one I know of off hand. I saw it live on TV as it happened. He didn’t make it. Otherwise, about 350,000 Americans succumb to it every year. Very common cause of death. Take care of the old ticker!