The reason that Jones was able to beat Ruiz was because Jones's power got Ruiz's attention, and also because Jones had the physique to be able to pack on muscle up to 193lbs and remain fast and energetic for 12 rounds. Calzaghe = no power, and he did not have that type of physique either. Therefore, he would have been nothing at heavyweight, nothing at all. The easiest night of Ruiz's career.