Probably most people have about a 1 in 80 chance of dying each year on average over the course of their life.
The US death rate is 1.04% per year. So in that sporting event example, statistically 313 of them will die within a year's time.
Also if the sporting event was today then only around 2.5 people would die in a car accident "this year" as currently we are already in July ;)
Anyway that is my bunch of nonsense statistics :)