I've gotta go with the hometown guy here, since me and Karo are both from L.A. Karo by armbar in round 2 or 3, otherwise an easy UD. I know Karo's only losses have come to completely physically dominant wrestlers (St. Pierre and Sherk), but I'm not sure if Diego is quite in that class of overpowering wrestlers. Diego, though, needs to stay off his back, because Karo will beat him in that position every time. If Karo has Diego in his own guard, it will be a bit more of a tossup. Overall though, I think Karo is too slick for Diego on the ground. But yeah, Karo by armbar.
__________________ Israel Vazquez....Super Bantamweight Champ....Super Heavyweight Heart
This man is my hero.