Bottom line, football is a violent sport and I'm surprised this doesn't happen more often but it's not always what we think. I remember when Detroit Lions Chuck Hughes died on the field in 1971 from heart stoppage, it was latter learned he had 75% blockage. I was a senior in HS and had just finished playing football in 1970 and it hit home hard because Hughes was not that old. I think we will learn more about Damar Hamlin and his health going forward. I'm not saying Damar has heart disease but I think we'll know more soon and we all hope and pray he will make a full recovery.