Heh, apparently I like to be very imprecise when it comes to potential ball ratings.
I'll have to dig around for the chart that people have posted in teh past. But I think 4 potential balls is superstar MVP (not p-allstar like I originally said).
Nope. 4 balls is PAS-SS, MVP+ is 5 balls.
Had to look, and the chart is in the FAQ:
Potential
5 balls = 10 - 12 (MVP - All-time Great)
4 balls = 8 - 9 (Perennial Allstar - Superstar)
3 balls = 5 - 7 (Star - Allstar)
2 balls = 3 - 4 (6th Man - Starter)
1 ball = 1 - 2 (Announcer - Role Player)