Sylvester Stallone Says Poirier Has 'Big Time Advantage' Over Conor McGregor In Trilogy Fight

Sylvester Stallone says Conor McGregor vs. Dustin Poirier III is gonna be one helluva fight ... but says Conor will be at a MAJOR disadvantage when he steps back into the octagon. "Poirier has the big-time advantage," Sly told us outside of Giuseppe Franco Hair Salon in Bev Hills. So,...