The biggest health dangers in combative sports are brain trauma from KO’s and TKO stoppages involving brain rattling. Concussions and CTE are to be taken seriously. So bouts allowing knees to the head of grounded opponents likely see far more dangerous stoppages and fight ending sequences right? Not necessarily so according to a recent study … More Study – Knees to Head of Grounded Fighters in MMA “Rarely The Decisive Factor in Fight Outcomes”