Potential5 balls = 10 - 12 (MVP - All-time Great)4 balls = 8 - 9 (Perennial Allstar - Superstar)3 balls = 5 - 7 (Starter - Allstar)2 balls = 3 - 4 (Role Player - 6th Man)1 ball = 1 - 2 (Announcer - Role Player)
You could get a draftee with role player potential with both one or two ball potential. That's why it is listed twice.