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Florida high school football player dies after game, becoming the school year’s latest tragedy | CNN
(www.cnn.com)
They haven't released this poor kid's cause of death yet but....
The National Federation of State High School Associations said last week that six high school student athletes died within the past month, four of them from heart issues and two from being hit, according to the Associated Press. Gainer’s death brings that number to seven.
I feel like high school football players dropping dead with heart issues isn't normal. But maybe I'm the weirdo. 
Yeah my full guess is he either had covid or had damage from long covid that made him more susceptible to the heat, but the primary cause was playing football in Florida in September