Conor McGregor vs. Dustin Poirier 2 lightweight bout set to headline UFC 257 fight card in January | CBS Sports Headlines Conor McGregor vs. Dustin Poirier 2 lightweight bout set to headline UFC 257 fight card in January The lightweight bout is a rematch of a 2014 clash won by … Continue reading Conor McGregor vs. Dustin Poirier 2 lightweight bout set to headline UFC 257 fight card in January