LOS ANGELES -- UFC women 's bantamweight champion Ronda Rousey has long been an outspoken proponent of drug - testing .
Ronda Rousey defends her title against No. 1 contender Cat Zingano Saturday at Staples Center in the main event of UFC 184 .
LOS ANGELES -- UFC women 's bantamweight champion Ronda Rousey , who defends her title against No. 1 contender Cat Zingano Saturday at Staples Center in the main event of UFC 184 , has long been an outspoken proponent of drug - testing .