Prior to entering the cage on Saturday for the UFC 189 pay-per-view event, the 22 fighters participating on the fight card must first officially weigh-in on Friday in Las Vegas. Chad Mendes and Conor McGregor fight for the interim featherweight title in the main event while Robbie Lawler puts his welterweight title on line for the first time in the co-main event against Rory MacDonald.
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