an Israeli commando could take a ufc fighter and SEAL easy. #1 in the world is the israeli commando by far.
They study Krav Maga - nothing that much better than CQB, MMA, BJJ, etc.
It comes down to training and ferocity.
SEALS and most Spec ops are rarely if ever in a hand to hand combat situation.
Why waste time and effort on something they will rarely if never use?
How about 300lbs UFC fight vs SEAL hitting target at 200 yards at iron sights on anAR
300lbs UFC fighter vs SEAL running 3 miles on the beach and the SEAL obstacle course?
How about SEAL vs. UFC fighter swimming 2.5 miles in open water in 50 degrees?