I own a fight gym in Orlando....
but I have to admit that there is something ungodly about "fighting" per se.
Boxing, judo, wrestling, jiu jitsu, etc. seem alright, because there's less chance for serious, long-lasting injury (with the exception of brain damage in boxing) or serious pain.
With MMA, however, you are purposely trying to inflict the most painful and serious of injuries on your opponent:
for example, holding the back of the head and pulling the face into a vicious knee strike;
continuous elbowing with all one's might the face of your opponent trapped under you on the ground;
attacking the parts of your opponent's body that are seriously injured or bleeding;
In addition, it just seems awfully unsportsmanlike to kick a downed opponent.
(or beat with a club)
That being said, I am still a big fan of MMA, simply because it is a more real-world fighting experience, unencumbered by rules which would leave you very unprepared in the street.
I can't, however, see the Apostle Paul engaged in this sport. Were he alive today, and had the extra time, I'm certain he would find MMA to be too ungodly to participate in.