Judo has all of the ground control of wrestling and many of the takedowns. It also uses a different variety of takedowns that add alot of explosiveness to an MMA game.
There is also instruction of submissions, which is very good for developing a good basis, and they're usually alot easier to use after you slam your opponent on his head.
Karo Parysian is a good example of judo being used to maximum effect in MMA. Hidehiko is really the big name judo guy, but I don't see him use alot of it in his MMA fighting.
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