I would say Baseball becaues there are so many games per season and they get a new ball when ever it gets dirty.
The sport of golf uses balls and clubs.
uhh my balls?
The sport of lacrosse.
snooker or biliards
The sport that uses the most muscles is ballet!
MLB. The average life span of a MLB ball is 5 pitches
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.
weight lifting sport uses the trapezius most.