Check out the UFC 184 main event and co-main event fighters as they step on the scale at weigh-ins and then stare each other down on Friday in Los Angeles. UFC women’s bantamweight champion Ronda Rousey puts her belt on the line against Cat Zingano in the headliner, while TUF 20 alum Raquel Pennington welcomes multi-time boxing world champion Holly Holm to the Octagon in the co-main event.