Where I live (Oregon) there's a sizable Lacrosse population, and the high school where my son will eventually go has a big Lacrosse team. Football is big but Lacrosse is almost as big, and I wonder if Lacrosse (or something like it) will end up surpassing football. But are the head injuries as serious? It seems like no.

Another interesting sport to compare would be hockey. While hockey players don't tackle each other like football players do, they do check each other into the boards and those can be some big hits. Is CTE prevalent in professional hockey players as well?