The NFL and collegiate footbal have spent millions looking into and striving to someday prevent the post-traumatic encephalopathy frequently seen in long-term football players, who may suffer many concussions.
And then we have boxing, a sport where creating a potentially fatal head injury in an opponent is often the most effective way to win. RIP, Patrick Day, professional boxer, born about 1991, died after being knocked out in a prize fight October 16, 2019.