Are you sure wrote:
Seriously, who wins this fight? Obviously, no weapons are involved, so this is just a no-rules, mano-y-mano fight to the death.
I wish I could say who I think would win, but I can't. That's why I started the thread. The world needs to know.
After reading through some of the answers and discussions on the original question, i think some may have gotten themselves off track.
As a former marine with the 1st recon out of the stumps (29 palms) I can shed a little light on the subject.
I'm not going to automatically say "OORAH, USMC we would kill em all". Sorry to disappoint. Every combative situation is different, and it comes down to the will to save your own life and/or the lives of your fellow marines/s.e.a.l's.
There was a comment that a seal would have the advantage in the water. Recon is an amphibious unit, just as seals are. The S.E.A.L's were actually brought about by being modeled after recon marine units. We're brothers, we're professionals in the art of subterfuge, recon, extraction, and terrorist neutralization. In essence, trained to kill in the quietest, most elusive ways possible.
Some are assuming, in fact that seals and recon marines are trained solely in the Krav defense system. Not true. Marines are trained early in their tenure with "MCMAP" techniques, which are derived from various styles of H2HC. Not only that but, spending time in combat situations, with service men from other areas of the world, we pcick up new techniques through continued training, with fighting men, from Australia, Great Britain, "ROK" soldiers from the Korean army. (Bad S.O.B.'s).
To begin to try to compare this type of training to an MMA fighter, who is trained in a gym, and chances are, never has to worry about fighting any other time, than in a gym or cage, is ludicrous. MMA fighters may have the advantage in a controlled environment, with breaks between rounds, and rules to fight by, but, that wasn't the original question. Hand to hand, life or death, you probably should stay in the cage, and let the ref stop it when it gets that far.