There are the Mixed Martial Artists. See above, for example, 21-year-old Isaiah Abels, who had a sudden cardiac arrest during a fight on March 8, 2023 and now has brain damage.
There are the boxers. See above, for example, Teenage European Boxing Champion, 16-year-old Vassilis Topalos of Greece, who died suddenly on December 16, 2022.
There are the military cadets. See above, for example, 21-year-old US Air Force Academy Cadet Hunter Brown, who died suddenly on Jan. 9, 2023. He had blood clots in his lungs.
Where is the rage?