Maybe he used PEDs , don't know
But in these analyses, people always under estimate the impact of having FULL TIME STAFF supporting you in these transformations
Everybody reading this now would make significant natty gains in 1 year time if they had a full time chef making a diverse meal plan that curbed the need for cheat days, snacking, etc. A personal trainer, a physical therapist, massage team, assistants, etc. In my mid 20s I was built like MBJ in the 2014 pic, I did a extended dirty bulk basically using creatine and doing starting strength and I gained like 30lbs in a year and half. Not all muscle but it's def possible to transform your body in short time periods