So many people recently 'died suddenly' - What's going on?

One needn't be a dedicated follower of sports to have noticed of late the number of young professional athletes, ostensibly at the apex of physical fitness, dying suddenly in practice or in play.  In the 38 years between 1966 and 2004, sudden cardiac death (SCD) occurred in 1101 athletes under the age of 35.  Of those athletes, fifty percent had congenital heart disease and cardiomyopathies and ten percent had early-onset atherosclerotic heart disease.   The monthly average SCD toll for those years is 2.35.  

The number of comparably aged athletes who died suddenly in three months from January  to April 2022 is 1,696% above the pre-2020 average.