Pacman has those big calves from his style of not being flat footed I guess. Jumping around all day while hitting the bag must be the reason... along with some hgh
Calf development is primarily genetic. There are women who never lift with better calves than most male bodybuilders
Genetic plays a big part in calves development. White people are more kind to have big calves even without working out.
Why would you need big calves to box?
The punching power is coming from the feet. Having big calves may help into putting more weight into the punches
I have zero calves. My lower legs look like Tommy Hit man Hearns calves. I was a sprinter in high school and college. I have always trained calves in the gym. They are just like Bill Grant's calves. I have seen so many guys that never have ran a step or used a calf machine that have decent calves.
Also, strong feet muscles and calves help a boxer grip the canvas and steady or right himself after taking an opponent's punch, making himself harder to knock off-balance or down.One reason is that boxer's calves might not seem impressive size-wise ,is because boxers (from a bodybuilding perspective) overtrain their legs with miles of running and rounds of skipping.