Remember the 12-year-old girl who was set to make her amateur MMA debut at Deep Jewels 16 against a woman twice her age? Well, it happened Saturday in Tokyo. And she dominated her elder. Momo, competing in the 95-pound minimumweight division, wasted little time in getting the back of her opponent and sinking in a rear-naked choke. Momoko Yamazaki tried to fight it, but Momo eventually put her to sleep.