I've seen every stat. I'm still waiting for the one that has an adult football player have it on the field. It doesn't exist. Now sports with projectiles like hockey, baseball, lacrosse, etc? Yes it would be believable. There's a reason the NFL Doctor silenced that thought after every armchair Dr in the country tried to regurgitate it because they read it the night it happened. He called it a "diagnosis of exclusion". It's a Hail Mary explanation after all other possibilities, like the ones SIGNIFICANTLY more likely, have all been excluded. The odds that they are going to find a prior heart condition (murmur or irregular heartbeat or something like that) are much, much, more likely than this was the first case in 154 years. Those haven't even been run yet, but every social media followers has already diagnosed it.