Bet Peg Pegula and Damar Hamlin know the answer to that.
And say nothing.
https://sportsnaut.com/damar-hamlin-roster-spot-buffalo-bills-news/
Commotio cordis, my gluteus maximus.
Damar Hamlin was asked specifically in an interview what the doctors told him caused his issue. He said he would not talk about it. Not that he didn’t know. He was told NOT to talk about. Most likely from the NFL’s lawyers.