Well think about it for a minute - they say he had a cardiac arrest due to "Commotio Cordis" -
...'Commotio Cordis' is described as a blunt blow to the chest, delivered at a specific point in the cardiac cycle which induces a dangerous, life-threatening heart arrhythmia or cardiac arrest...
The NFL is over fifty years old with 544 games every season and this is the first time it's happened? Not to mention the armor-like padding to help prevent injuries? Seems kinda strange.
Anyway, stay tuned... it's about to get... mysteriouslier... //shamelessly stolen from Borderlands3//