In that interview, Ronnie said it wasn't until he was dieted down, 3 weeks out, that he truly realized how much size he had lost due to age, injury, inactivity, etc.
So if that is the case, IF that is the case, it'll be 3 weeks out that he realizes he will be 15-20 pounds of muscle smaller than Phil/Kai.
But hey, I read that Jay is going to "Bring his best form ever" and "has the right trainer" and "is going to shut down all the haters".