We went through a phase where the fanny pack was kind of cool and useful, then a phase when the fanny pack on a man was made fun of. Now we are back to being ok with the fanny pack, so long as you are wearing The Man Sack. Plenty of sack room to store your goods.
If you need a very niche ball sack, you could take a look at this similar pack specifically for golf. This is the MySack golfing storage pack. Great for storing your balls, and also your nuts (you know…for snacking on between holes).