Billiards/pool.
The sport of golf uses balls and clubs.
uhh my balls?
snooker or biliards
shinty,lacrosse
Golf
All sports.
Depending on the sport, balls could be made of : Plastic, rubber, composite or all natural materials.
In the sport of American football, the balls were first made from inflated pig bladder which was then put in a leather cover. The US started to use the slang-term, pigskin.
croquet
Football is a sport that uses a pigskin.
yes in china
I would say baseball becaues there are so many games per season and they get a new ball when ever it gets dirty.