I am not sure that you need a frank concussion to rack up long term damage though. Soccer players can acquire CTE from repeated headers of the ball, which rarel

I am not sure that you need a frank concussion to rack up long term damage though. Soccer players can acquire CTE from repeated headers of the ball, which rarely cause the kind of concussions you're takling about. I think the take away from all the present research is that it's generally a bad idea to bonk your head into things repeatedly, whatever the sport.