This rule is ridiculous the NCAA doesn't allow ANY college basketball players to wear a number that includes a 6, 7, 8, 9 in it. Refs can identify numbers using two hands the NBA does it. This is a rule I just found out about because a family friend got recruited to play basketball at Northeastern and he wears number 7 in high school and the coach told him he can't wear 7 in college. Not a big deal, but found this rule to be really dumb.