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, why does Stallone feel that way?
"You got a really hungry, young guy (Poirier) and then you got a guy who's made a lot of money but he's also sorta hungry (McGregor)."
The two UFC stars are set to fight for the third time at UFC 264 on July 10.