Oh dear. What's going on here?
Too many shots to the head. Now, that most of the fights are predominantly standup, MMA, is a very dangerous sport, from a long term health standpoint.
This from Mac Danzig who recently retired:
"After sustaining some pretty severe concussions last year, and me thinking about my future as a father -- my future as a person -- I don't want to have Alzheimer's or dementia when I'm older. I don't want to force this past what I'm capable of taking. I've been in it for a really long time [13 years professionally, 14 total]. My body feels really good otherwise -- I feel like I'm in great shape. But, taking shots to the head like that, and losing my ability to take punches and not go out, has been a major factor in my decision."