Boxing
You are going to get punched in the face, over and over, every single day you decide to box. Literally—part of the game is accepting blows to the head. So, it makes sense that boxing ended up on this list.
Few Deaths, Multiple Devastating Injuries
While only 500 boxers have died over the course of the organized sport's existence (think back to when people figured out that they could punch each other), countless boxers suffer from serious long term injuries. Brain damage is one of the most common injuries in boxers, and the establishment of CTE is borderline inevitable in boxers that have been participating in the sport for their entire lives.