I'm pretty sure Pac would KO Mosely in less than 6 after seeing this. He was lost & befuddled with PBF in the face of a little speed, a few 1-2's & not being able to land his punches the way he wanted to. That kind of hesitation she showed would spell a violent KO at Pac's hands. He would get steamrolled.
Pac would still have a very good chance against PBF because he doesn't wait for openings, he creates them & sometimes creates them when they shouldn't even be there.
I'd love to see what Williams could do with PBF & vice versa. I would be much more impressed with a PBF win over William's than one over Pac. If would be nice for him to close out his career with a performance like the one he had over Corrales back in the day.
Eh, in the end PBF will probably dig up Winky for his next fight.