Always found it interesting that, with very few exceptions, player numbers only included numbers 0-5. This is so the referee can signal to the scorer's table, with his hands, which player committed a foul.
I didn't realize this until about 6 years ago. I was the volunteer athletic director for a small catholic middle school and our 5th grade program was humongous so i ordered a bunch more jerseys. I ordered numbers like 8 and 27 and 36. The first game with them, the referees gave me such a hard time. It was all in good fun but every time they made a two-handed foul call to the scorers table, they shot me a look and rolled their eyes.
Always found it interesting that, with very few exceptions, player numbers only included numbers 0-5. This is so the referee can signal to the scorer's table, with his hands, which player committed a foul.