The blitzballs in FFX look to be roughly 45 cm in diameter. That's a radius of 22.5 cm.
The volume is (4/3)pi(r)^3. So the volume of one blitzball is 47712.94 cm^3.
Observing the sport we can conclude that the blitzball is neutrally buoyant. So therefore, we can also conclude that the blitzball is the same density as water.
The density of water is 1g/cm^3 or .001 kg/cm^3
So the mass of the blitzball is 47.71294 kg. The weight is 9.81(47.71294)= 468.06 N
Converting, that is equal to about 105 lbs.
Yet children toss it around like a toy, and the players can throw it the entire length of the sphere.
This was taken from the Current Events message board on GameFAQs, all credit to kineticsoldier
Conclusion: I call shenanigans.
Not true. At all. None of that mathematical "stuff" was genuine. Same density as water... I don't think so. That formula you used ((4/3)pi(r)^3) is not at all how you would find the volume of a sphere.
Dude Perfect is a TV show and YouTube channel with millions of subscribers. They are definetly not fakes and they use blitzballs. Check them out: google dude perfect blitzball and the video will be the first thing(sorry but it wouldn't let me insert a link).