So you know his vaccination status?
It’s a known syndrome. From 2000.
https://emj.bmj.com/content/17/6/421
Non-penetrating chest blows and sudden death in the young
“ Collapse is usually near instantaneous, but there can be a period of activity following impact, usually only of a few seconds duration.”
That describes exactly what happened.
I assume like every NFL player he got the jab. More than once.
It’s theoretically possible the jab contributed, but no one knows and as known, these things are known to have happened even before this mRNA jab.