It's hard to know. They might be trying to keep him hydrated as a preventative against his cramps ... or maybe he just didn't train as hard.
I'm guessing Pac just didn't have to cut. In Marquez 3, that 144 catchweight probably had him run a little bit and get rid of a bit of fat and water. It can make the difference in terms of appearance. He's probably got the same solid muscle underneath.
So because he didn't juice this time, that's why he weighs 4 lbs more than he did at the Marquez fight? Ok, makes sense to me.
well tbh "official" hi def pics havent come out, those are screenshots from the stream. the one posted from the Marquez III weigh in is probly a still shot at his most flexed form and a good cam
i think they worked more on his speed, so no exercise with heavy resistance. hes got less muscle but probably more speed and flexibility.