Judo, for sure. It'll give at least soem ground training, and lots of throws and clinch work. If you can control throwing and clinchign aspects of fighting you can control a fight as that's the bridge between the ground and standing. Might want to look int some boxing too.
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Member of DaJoGen MMA school under Dave Hagen and Team Chaos fight team under Denver Mangiyatan and Chris Toquero, ran out of Zanshin Martial Arts in Salem Oregon: http://www.zanshinarts.org/Home.aspx,