Damnit, I had to check. A regulation baseball has a circumference of 9" to 9-1/4" (huh. I thought they would use something easy to check like Diameter, but I digress. ) That means a volume of 12.3 - 13.4 cubic inches. I used 14lbs as an average bowing ball. So the universal sportsball has a density of roughly 1.09 lbs/in3, or just over 30,000 KG/M3. So... about 60% denser than tungsten, actually denser than any of the elements. About the same as the sun's core (33,000 KG/M3) Would be good for a game of [RollerBall!](https://www.rottentomatoes.com/m/rollerball) Edit - formatting Edit 2 - The 1975 RollerBall which actually goes really well with the condition of our country, not that absolute turd of a remake.