You've got it a bit mixed up. People aren't saying it's so Brock can get nice and juicy before this fight. LOL I did like that wordplay though.
They're saying Brock has been nice and juicy for a long time now in the WWE which has a culture of steroid abuse. He'll probably need to lose and cut over 50lbs to make weight from his pumped up, WWE body. PED users don't just take something before a fight. They take things for a period before the fights to train harder. If Hunt is right, and Brock is juiced up, he'll merely get to cycle off just as other fighters have always done so he'll test clean. The whole purpose of the 4 month period is to prevent this cycling.