what?!?! wrote:
I guess you missed the part of the original question that said no weapons??
A UFC fighter would have them in a submission hold within 15 seconds and choke them to death.
They might get a submission hold if they can avoid being punched or kicked in the nuts, an extremely difficult thing to do when grappling. Considering they're used to that not being allowed in their sport, they probably devote almost no training to it at all.
And they might maintain a submission hold if they can avoid being eye gouged, another thing that's not allowed in their sport.
And of course they would have to deal with maneuvering over a much bigger arena, yet another thing they never train to do.
MMA fighters train to fight in a confined area, against an opponent who expects their attack, with all the most dangerous - i.e. effective - fighting methods barred. A soldier trains to maneuver for advantage, attack when advantage is gained, and use the most effective methods to defeat the opponent. A good soldier would just ambush the MMA guy, sneak up and shove him off a cliff or kill him with blows to the back of the head. A good soldier would not be unarmed in the first place anyhow.