Checkmite
Skepticifimisticalationist
I'm sure you'll be able to provide the evidence for your implied claim that high school kids are dropping dead from cardiac arrest and dehydration at the same rate whether before, after, or not at all involved in playing or practicing football.
The offered statistic was 36 high schoolers dead of football from 2001-2011. This gives us an average of 3.6 deaths a year from football.
Here are four cases (1, 2, 3, 4) of high-school age individuals dying of cardiac arrest in the past 12 months. They are the first four cases I found; there are others. 3 of the victims were found dead at home after sleeping; the 4th suffered cardiac arrest while sitting in a car. In each case the cardiac arrest was preceded not by football, but by a state of rest.