“It has nothing to with her not being a star. It goes by weight. If she was the highest weighted champion on the card, she would be the main event, but you have two guys that are middleweight and she weighs 135 pounds – so she’s the co-main.”
UFC President Dana White told UFC.com that Ronda Rousey’s co-main event billing has nothing to do with star power, and everything to do with how the fight business works.
UFC bantamweight champion Ronda Rousey will defend her title against Cat Zingano on Feb. 28 from the Staples Center, in Los Angeles.