he was pretty impressive back in the day. submitting Pat Miletich etc.
now at 31, he has 5 losses in his last 6 fights 
He had said himself, he is too big for 170lbs and too small for 185lbs, plus he took some time off pursue his M.D. , and when he decided to fight again and the game passed him by. He needs to quit being a Ronin and join a reputable fight team. Oyama is by no means a top level fighter,but he is scrappy and naturally bigger than Carlos, I wouldn't be suprised to see another L on carlos's record after this weekend.