3.
Play what?
millions.
I would say 9, the same number of people that play baseball. Kickball is just like baseball, but you use your feet to hit.
120 total players for the year of 2009. Some players share the same numbers as others.
at last check it was estimated that 16 million people in America alone play the game, I am unaware of what the numbers are in the rest of the world.