chavez put on approximately 30lbs overnight

Weight cutting is a science,30lbs could be done pretty easily,10% water is pretty safe and easy to do,that would give chavez nearly 20lb straight of the bat.

Add in eating pretty much nothing and burning fat through training and your nearly there,its not a nice process but ive done it myself and helped plenty training partners to know it can be done with little or no problem.

Long term it might not be as good.