Perhaps they used golf balls. LOL
It's been a while (longer than I'd like to admit), but it was probably 6" or 8" diameter or around there. I agree with the earlier post about limiting the ball sizes to the larger ones to prevent such a problem. Again, I like the game in general, and all competitive games. I was a wrestler in high school myself, as well as football and track. Never did like baseball, too slow.
Anyway, my purpose in posting was to expose the dangers of the game. It is a great game, but it must be administered with some adult supervision and a little common sense.
Understood! Yes, I can see younger kids, left on their own, improvising with the contents of Dad's golf bag. :^)